boss 25 - call of house hardabar - march of the ogres and the ogre chieftain (sacred grove)

Call of House Hardabar (Grimrock 2 MOD). Difficulty: Hard.
Download: www.nexusmods.com/legendofgrimrock2/mods/167
Another one of the most difficult fights of the game. You must use invisibility + backstabs in the first part of the fight, "the march of the ogres" and run away from the only ogre that sees you even with invisibility and that moves faster. Once this combat is over, some aetheric ogres and a non-etheric ogre will appear, in this part of the combat invisibility will not help you, you must run away from the non-etheric ogre (the most powerful) and kill the aetheric ogres one by one with backstabs with weapons that damage aetheric enemies, once you have killed the aetherians you have to kill the non-etherian ogre, there are several ways, the one in the video seems to me the easiest, surely at a distance with firearms you can also fuck it up.
The "techno sword" is nothing special (for how hidden it is), it is not far from the ethereal sword that you can buy in malan tael or mount khand for a modest price, besides for being a heavy weapon you can not do "backstabs", the special magic power of "techno sword" does not affect ethereal entities (paradoxically), I forgot to test that magic on normal entities, I will do it in the next fight, maybe I'll get a surprise.
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It is essential to install the 4GB Patch to prevent the game from crashing (this happens in large mods for technical optimisation reasons):
Link: www.ntcore.com/4gb-patch/
Download the program, run it, then it will ask for a path, then choose the path where the grimrock 2 executable is: "grimrock2.exe".