Blood elf from world of warcraft whom you can never kill because everything he does is "merely a setback." Rest assure he will appear again in Icecrown for Magisters' Terrace was merely a setback!
Kael'thas: Don't look so smug! I know what you're thinking, but Tempest Keep was merely a set back. Did you honestly believe I would trust the future to some blind, half-night elf mongrel? Hahahaha... Oh no, no, no, he was merely an instrument, a stepping stone to a much larger plan! It has all led to this...and this time, you will not interfere!