Champion Gundyr - Dark Souls 3 Boss
I beat Champion Gundyr after a few tries without too much difficulty. His second phase caught me off guard the first time, and I was kicked in the jaw to death.
I think this was favorite part of this game. The very surreal atmosphere in an already very surreal game. This entire area is packed with lore and background information on the vary world and your own impact on that world that you have been traveling through.