Hidden Item Effects You Didn't Know About - The Binding of Isaac Repentance

[@Banshee523]

An even less known effect of Book of Secrets is that it can do the Shiny Rock effect in the room you used it in. So it can possibly find crawlspaces. I presume the reason it went unnoticed for so long is because the effect of Shiny Rock wasn't even functional in Repentance until relatively recently.

[@danizk0]

Holy shit, now that's really obscure!

[@conjim]

the Mom's perfume item lets you break the Tears soft cap as it's actually not a Tears Up, but one of the few Tears Delay Down items. Functionally the same, your fire rate will still increase, but as it's not a Tears Up, it's not affected by the cap.

[@sunbleachedangel]

There are a bunch of items that do that

[@smore9831]

@@sunbleachedangel i cam only remenber the teardrops

[@sunbleachedangel]

@@smore9831 Pieces, antigrav, cancer (the trinket), maybe something else I forgot

[@smore9831]

@@sunbleachedangel yeah i think thats everything

[@XD-sp4ye]

@@sunbleachedangel I think tractor beam too

[@UserTRIN]

1. Charm of the vampire makes your character not reflect in mirrored surfaces (downpowr floor for example) 2. If technology 2 being picked up by Cain or character with a stapler he will shoot only with tech laser. 3. Midas touch reduces Ultra Greed boss armor by 25% and makes poops spawned by any character effects have chance to become golden one.

[@ToxxicBurst476]

Mom's heels on Tainted Maggie is almost S tier, because you get the hug damage AND the heel damage every time, but I believe the heel damage can kill some enemies before the hug can, meaning you don't get the guaranteed heart from the enemy.

[@kapiquantum]

And aries and this is op

[@Penguinbrawler2000]

Also habit

[@n347f0x]

And Blind Rage trinket (Doubles the invincibility frames Isaac gets after getting hit.)

[@romulohenz1437]

And also rock bottom

[@sans-real9473]

@@romulohenz1437 i swear someone ALWAYS says rock bottom

[@phuongtruong8987]

It wasn't actually stomp immunity it was that the stomps used to be considered an explosion

[@trceb]

Found that out that hard way while trying to re unlock the forgotten. Rest in pepperoni

[@paichni3474]

Fun fact about book of revelations: you will always get conquest instead of death on floor 4, making it so that you spend many years of your life grinding out the most boring task until you give up

[@IsaacGuru]

Yup, if he is unlocked he replaces Death.

[@gamingmaster6377]

Whats so grindy about conquest?

[@paichni3474]

@@gamingmaster6377 to get the bandage girl you need to get the 4 bandage balls, and after like 20 minutes or something u get to womb and u get conquest so u can’t get the achievment (Luckily if u just use box of friends in boss rush u can get it easy cuz all the charges)

[@gamingmaster6377]

@@paichni3474 makes sense

[@Chinag]

Should've mentioned that Book of Revelations doesn't spawn a horseman in the alt floors!

[@smore9831]

They can't appear there so is obvious, the book only works if the boss cam appear there if in right

[@brainha5747]

you couldve mentioned about the reverse devil card being able to one shot mom as well, or how host hat can also block projectiles coming from above

[@lyvale]

I think host hat wasn’t mentioned because blocking above projectiles is nearly its whole function as well as hinted at in its pickup description, whereas spelunker’s main function is for secret rooms so most people wouldn’t even realize it has this additional effect

[@larfee5191]

Reverse devil card - same as using bible Bible - kills the mom Where the fuck is hidden property

[@spacer-lx5pq]

But it isnt an item, it is an consumable

[@Oscar-st2np]

If i recall, the book of revelations also doesnt make a horseman spawn if a special boss room layout was already generated on the floor. i.e Fred, Double trouble boss fights, Geidon/the Shell unless they changed that effect in repentance, but maybe give it a test

[@pok3dex756]

this is true

[@chaathon]

also horsemen don't spawn at all in the alt path

[@ChilledoutDevil]

amazing how there's always some shit i don't know, thanks

[@brandonmorris3746]

Go alt path

[@Lichtkrieger13]

Before Repentance the most common special Boss layouts were Double rooms as well as Forgotten Horseman and Fallen

[@thebishopoldchannel76]

2:28 i always like the combination of the kill sound and the book use sound you hear when you do this

[@shoebillenthusiast]

Never knew about some of those effects,also i find your videos to be very informative and interesting, keep up the good work!

[@ShadyDoesContent]

2:23 Learned this the hard way

[@max.i9389]

Same 😢 it was a good run...

[@gonko638]

Me too... but I had 9 lives so it was all good :)

[@ShadyDoesContent]

@@gonko638 you lucky son of a gun

[@fokionpapanikolaou1371]

The thing is, mom actually dies from the book when you use it, because if you watch one of the endings, a book fell on mom's head, and it was that book

[@TitorEPK]

Out of these all I didn't know that harbingers are always stage specific and The Peeper being a damage up, good info

[@piern1k336]

6:05 I found out about it in hard way, fetus+butt bombs=30 minutes of dingle

[@murlocaggrob2192]

A couple suggestions for the next one: * Book of Belial grants a damage multiplier in addition to the damage up if you're holding Blood if the Martyr. * Black Candle removes the teleport effect from Cursed Eye. * Night Light removes Curse of Darkness when picked up, and removes the visual effect if it happens on a later floor (effectively removing the curse). * Glaucoma makes the screen slightly darker. * Shade will cause Isaac to deal contact damage after its been destroyed. That damage is increased by BFFS. * Stapler causes you to only shoot out of one eye, causing the same minor rule changes that affect Cain. * Hive Mind increases the size and damage of fly and spider familiars, just like BFFS (it doesn't stack with BFFS sadly). * If a second copy of Brimstone is picked up, it gains a more powerful beam and unique costume. Each subsequent Brimstone is just a damage up. * Each copy of Crystal Key you're holding will increase the chance of getting a Red Room, up to 100% at 5 keys. * Glass Eye has a unique costume where both eyes are replaced if two copies are obtained, although no other benefits.

[@FishyTheKobold]

I feel like at least a fourth of these are known, especially the brimstone and stapler ones

[@murlocaggrob2192]

@@FishyTheKobold A lot of the things in this video were also known. I knew absolutely everything in it (although I am a wiki regular). I'm just suggesting other hidden interactions.

[@1augh0utL0UD]

After 4 years old okaying this game, im still learning sooooo much. This is literally the reason I love this game so much. Thanks for the video!

[@icebro3457]

I know that hot bombs does not make you immune to mega Satan's fires. Now that I know pyromanic make you immune to fire I wonder if that work against mega Satan's fires

[@miraclePoints]

Mom's Locket turns all half red heart pickups into full red heart pickups. I learned this on a Tainted Maggie run and it was a crazy powerful combo.

[@Meatballin]

I mean that’s not really a hidden effect. That’s just what it does. Solid combo tho

[@miraclePoints]

@@Meatballin I didn't know about the full heart effect until I installed external item descriptions. I thought that healing you when you use a key was its only effect

[@Warsmith_The]

The flames from red candle, blue candle, bird's eye, and ghost pepper can also be used to destroy shopkeepers.

[@IMFERMO.]

Hi mr guru, i would like to know if you could make a video talking about differences between Antibirth and what Repentance delivered at the end, not like cut content but a direct comparison

[@thegooberst]

Polyphemus turns overkill damage into a tear of such

[@samkerubin1386]

8:13 d10? more like DIO XD

[@fulguroboy7739]

By the way, if you have Curse of the Lost and use Book of Shadows, it will istantly give you the I can see forever effect. Also, it will skip the mapping effects you already have (Map, Compass, Blue Map), so combined with The Mind for example, it's a guaranteed ICSF each floor!

[@codewallette]

Do you mean book of secrets...?

[@IsaacGuru]

I just tested this and it doesn't seem to be the case. The curse doesn't help the equation. You must have all other map effects in order for that to happen.

[@guydudething2795]

So with the mind it turns into X-ray Vision that takes active space?

[@bwax_]

Did you also know that using the poop item will trigger the effects of birds eye and ghosts pepper?

[@guydudething2795]

Also works with any item that makes you fart One thing that's worth noting: if you have hallowed ground the poop will spawn holy poop

[@BroskiPlays]

This is a great new series you got here bud! Keep up the good work and the awesome original isaac video ideas!

[@wingedfish1175]

3:06 the wording seems a bit confusing here, should it say it's converts bad pills to good

[@XenusYard]

I think they meant to put "either positive or *neutral* ". Probably just a mistake.

[@boromus7197]

Hey i found a bug i cant seem to find anywhere else on the internet. But i was playing tainted isaac and got ludo with moms knife and dropped the item. But when i would enter a room that was the same size (xl rooms didnt work) the knifes from ludo would still be there and deal damage. Edit the additional knives from twisted pair and conjoined were still in place where i had left it before

[@skeleton9476]

Mom's heels... I can just imagine isaac spitting tears and kicking enemies in ballet style with some violin playing

[@iskamag]

Wait, peeper and scooper AREN'T USELESS? My whole life was a lie...

[@planetsliveinsidethemoon1600]

Me, with almost two thousand hours in the game over several years: I bet I already know all of these, seems like a fun watch to test it though And then I didn’t! I had *no* idea that Book of Secrets opened secret rooms, or that Abel did more damage with Cain - those are all such great touches! :D Does that mean with the Mind, the book is just free secret rooms every floor? (Also, whatever you did to spawn the items and enemies you want right on cue was amazing! Was that a mod, or some tricks with the debug console?)

[@IsaacGuru]

Yes, having The Mind will instantly open up the secret rooms when used. The magic you see is done with my Utility Commands mod that you can download here - steamcommunity.com/sharedfiles/filedetails/?id=2666310447

[@jurajmolcan5204]

3:11 Just wanted to ask, wasn't there suposed to be a neutral effect instead of negative effect??

[@mt2r-music]

Yea probably a typo

[@IsaacGuru]

Oh my god I did it again with the same word and same item.

[@vermilisix]

I feel like some gamebreak could be caused by Butt Bombs + 4.5 Volt + a poop themed boss

[@M3M0RYY7]

"Mom can we have soy milk at home" "We already have a soy milk at home" The soy milk: 8:04

[@somewackoonyoutube2449]

1:03 I like the way the narrator says "Pretty fly".

[@mains8913]

Not a very useful one but the tech 1 laser beam scales infinitely in size with damage, it doesn't cap out

[@CasperTheGhost64]

Thanks for putting these videos in a playlist

[@bossofthegym]

I believe u cant spawn a horseman with book of revelations on an alternative floor.

[@Goggl35gtagvr]

2:03 “EYE SACKKKKKKKKKKKKKK” -It Lives!

[@superantiguy4347]

Something about lucky foot it also increases chances of winning at slot machines and fortune tellers, however on hard mode fortune tellers do not get this increased bonus

[@joeybonzo1758]

Suddenly the peeper is not a trash item

[@chaathon]

damn i really didn't know at all for the Mom's Wig one, and i have over 1k hours on this game, and it's an item i'm always happy to take, AND i have the external item descriptions mod enabled, how did i not notice that earlier also wasn't aware of the Halo of Flies too great video, always easy to follow and always a bunch of nice stuff to discover!

[@dungeaterfancam]

I think it’s really neat, actually some other mom items heal on pickup iirc and mom’s lipstick drops a red heart, it’s a nice detail probably in reference to mother actually loving Isaac, well, in her own way.

[@chaathon]

@@dungeaterfancam Mom's Pearls gives a soul heart too, and both Mom's Pearls and Mom's Lipstick hearts bonuses are there since Repentance (unlike Mom's Wig, which is why I am surprised I never noticed that earlier). I agree with you that it prolly is a ref to Isaac's mother's love tho! it's neat and I really love Repentance for that it added so much little details here and there

[@weblibrarius6783]

me:mom can we have soy milk+rock bottom mom:no we have soy milk+rock bottom at home soy milk+rock bottom at home: 7:57

[@XxViperTheXxX]

Also the Bird´s Eye does the same burning tranformation like the red candle

[@zendakon8299]

I'm sure you've got this comment already but in case you haven't, At 2:50 when describing Lucky Foot's interaction with pills, you described it as "Converts all pills to have either positive or negative" when it's actual positive or neutral. Also butterbeans damage is from collisions not the initial knockback.

[@IsaacGuru]

Yup, and I actually did the same mistake in another video featuring the same item. :X Collisions caused by knockback, yeah, I used simpler wording there.

[@NoVaDesertfire]

Also book of revelations unless it has been changed because on rebirth it cannot replace mister Fred. But I haven’t encountered it since on any further versions because I haven’t tested

[@chaoticpoly]

you could watch this 10 minute video or spend 10 minutes downloading external items descriptions and get the same amount of knowledge lol

[@IsaacGuru]

EID does not display every piece of information for every single item. You should also add a few minutes spent on reading descriptions. And a couple of days/weeks/months actually seeing those items in game.

[@mcrut111]

Book of secrets will also highlight tinted rocks in the room it was used in too!

[@justwhy9427]

Extension cord is busted in multiplayer, if the player without the trinket dies the player baby can just sit at the opposite end of the room as the alive player and it will just shred everything.

[@eri0685]

i figured out the red candle thing the hard way

[@toastydevil]

2:50 Did you mean positive or neutral? I'm pretty sure phd and luck foot don't allow negative pills

[@IsaacGuru]

Yeah, it's supposed to say neutral. My bad.

[@neoxus30]

I feel that butter bean is painfulky underrated)

[@guydudething2795]

Definitely

[@sunbleachedangel]

3:00 *neutral, not negative =D

[@IsaacGuru]

And it's the second time I did this mistake. :\

[@eskeline]

i accidentally instakilled moms foot on a fresh repentance co-op save and was suprised for a bit but then remembered

[@disturbedpictures12]

Mom’s heels sound good with t.maggy

[@bruhpeko3493]

As a new player, this Is very nice!

[@janoskiraly805]

I kinda feel cool that I already knew most of these

[@RubenGonzalezist]

Very informative, thank you!

[@patryhy1475]

1:06 It obviously also includes one from slot machine.

[@animefan715]

How did you get the little item descriptions to pop up next to the stats, at the top right?

[@IsaacGuru]

It's the External Item Descriptions mod.

[@Dazyhead]

You can use ??? Poop active item to remove spikes from the ground because the poop sprite takes over that specific sprite.

[@IsaacGuru]

Nope, it's the other way around.

[@ftwinzeler]

6:20 except for the colostomy bag boss. Since he spawns butt bombs himself

[@BalsamicJeebs]

im pretty sure using book of rev on womb 1 will guarantee a conquest fight, but I could be wrong

[@crelos3549]

The book of revelations does not make the bosses on alt path harbingers

[@santiecheverri4091]

9:11 wait what? The flame kill one of the enemys

[@rompevuevitos222]

Butt bombs made me softlock during the Beans challenge Since i went against a poop boss and i had ditched the fart bean active So i could only heal the boss

[@DylBro101]

Fun fact, all orbitals instantly kill flies. They just have so low health you don’t really see it

[@Cute___E]

yeah but pretty fly normally doesn't do damage

[@Outliers4Life]

wait so red candle doesnt do damage? what is red candle’s use if it cant do damage? or is it just those specific enemies?

[@IsaacGuru]

It's just those specific enemies that have a fire variant.

[@ryanoatee8315]

3:11 Did you mean neutral?

[@IsaacGuru]

Yep. I did it again.

[@schizophrenic_rambler]

Do the peeper or scooper affect brimstone lasers?

[@enzogusman2343]

If its real pandora box + strange key is one of the best combo in the game. (Just not d6 + glitched crown level)

[@hellothere2572]

Nice vid as always :)

[@greenagoo]

does the missing page/missing page 2 affect dry baby's effect as well?

[@IsaacGuru]

Yes, it uses the same effect.

[@mrdude3074]

Slipped rib can damage flys, the same affect as Pretty fly

[@aeternis7680]

most of these stuff are also outline in the eid mod

[@pulchritudinoushog]

Some people play on console and can't install that mod

[@IsaacGuru]

Everyone can contribute to the EID descriptions on the Github page. If you notice that something is missing, feel free to add it.

[@wingedfish1175]

2:32 isn't there an item unlock for doing this? Or is that on mom?

[@ibs_haver]

Halo unlocks from doing it to Mom

[@Mlikaw]

8:53 any kind of fire gives that effect

[@LilyTheSmol]

2:54 I'm gonna guess that's a typo and you meant "neutral", not "negative"

[@IsaacGuru]

Yep!

[@Snitsky9]

6:07 But that's a design flaw, imagine you have dr fetus + butt bombs.. softlock?

[@kkotheracountnstuff]

8:28 MMMHMMMMMMMM *horf turns into a like 60 hp enemy*

[@IsaacGuru]

**tends to**

[@superduperdrew12345]

There is a bad typo in the explanation of lucky foot, it says positive or negative instead of positive or neutral.

[@IsaacGuru]

Yeah, and it's not the first time I did it, too!

[@youngmostafa]

The mom heels one was new to me and I have 1k hours in the game lol

[@codewallette]

Its a repentance buff so its understandable lmao

[@alexandersolodovnikov4840]

Cool video. Thanks.

[@hueyspectrum]

I knew ten of these and I don't even have the game. So that's cool.

[@ShenHibiki]

Wait, lucky foot... "either" a good or bad? I thought it got rid of the bad turning them good... ignoring the neutral ones, of course

[@IsaacGuru]

Neutral* I got the wrong word in there, sorry.

[@spookyjohn6543]

I like how abel deals more damage with cain Since it was the name of his brother

[@MisterIncog]

Whom he killed

[@EverythingChannely]

I tried the Bible on the satan fight It killed me But I was playing Azazel with 10 lives and somehow still killed him for the first time

[@ognjensrb3995]

how are you using commands like that? why is it instant? do you have a friend who does it?

[@pendingchange3776]

The spawning or horsmen is why i never use the book their item (meat/bandage) is meh

[@daliag2424]

05:31 what's the reason behind this?

[@IsaacGuru]

Bible lore. Abel was the opppsite od his brother, Cain.

[@KillerMeme]

I definitely dislike that debuff to red candle it was just kinda mean change

[@Outliers4Life]

love this comment section you guys are giving a lot of useful tips

[@Sierra_Vice]

I actually didn't know about the halo of flies effect, the rest I know mostly thanks to the EID Mod 😅

[@stringscat8075]

Name of the mod that has the "indicator" on top of pills?

[@IsaacGuru]

External Item Descriptions.

[@Emanuelmartins69]

Wait? Lucky foot doesn’t make all pills good?

[@too_many_seeds6539]

But whys not conquest not in the gang of these guys named famine war pestilence and death of the final boss of that giant demon

[@too_many_seeds6539]

The demon in the lava place where isaac is flying had defeated dogma

[@IEmbrazeI]

Doesn't lucky foot always give positive ir neutral Tears, i never had negatives with cain

[@IsaacGuru]

It's supposed to say neutral, I misspelled it. :(

[@IEmbrazeI]

@@IsaacGuru oh no problem, i thought i missed something ^^

[@leo-bf9dx]

I always thought D10 was called DIO

[@edward9487]

QUICK, SOMEONE TELL HUTTS

[@arrozcocido1196]

The strange key + pandora's box can spawn C section?

[@IsaacGuru]

Why not? C Section is in the treasure room pool, the most common one to get picked.