Spirit gates can be used multiple times because it's a soft once per turn effect. Meaning if you have another copy of that card on the field, you can use its effect again. If the card says: you can only use x effect once per turn, then you can only use it once no matter what. Key word here is "only", if you want to differentiate.
@YayaTriesLifeАй бұрын
That's actually really helpful, thanks! "Once per turn" should actually mean once per turn in my humble opinion lol hella annoying this card