Demon Wall (Final Fantasy 7) - So yeah, most of you are thinking, what? It's just a wall, not important, just something you fight at the end of the Temple. Well, true but when you are underleveled (between red dragon and demon wall there is no enemy spawn so no change in levels) and didn't know what multiple saves were back in the day. This thing will kill you. I was in a pickle so had to try and figure a way out to get out of the temple, I worked out a way to kill because before had it was destroying me.
Xemnas Final Form - KH2 - WE SHALL GO TOGETHER!
The Edge - Furi (play this game if you haven't) - You went from dodging like crazy to just you and him and parry.
Gehrman - Bloodborne - Just because.
Fereldan Frostback - Dragon Age Inquisition - But that's not really a real boss, I hear you say. Really? So you weren't impressed the first time you went to fight a dragon and it swooped down, started kicking your arse, then bloody screamed at you in one of the best video game sound effects ever? Whatever.
I'm pretty sure there are others but my memory escapes me.
Hmm, pie.
