Which champ has the most intresting ult mechanic to you?

Not considering dmg or anything, but more like cinematic or anything else. My choice would be Mordekaiser, I mean you go 1vs1 with him on his terms and nobody can help you. Pretty cool ulti would you agree?

EDIT: funny nobody named Pyke. Dont you get a bit scarred of the sound effect when it's a team fight, he just ult'ed 3 down, you are half hp and he just started swimming?