Mountain ELF.
The Big Bang Theory Season 4, Episode 23
Don't ask me, a little ELF did it. Ha, ha.
The Big Bang Theory Season 6, Episode 6
Warlord beats troll, troll beats ELF,
ELF beats water sprite...
The Big Bang Theory Season 3, Episode 5
I'm a rogue knight ELF.
The Big Bang Theory Season 1, Episode 3
The mighty Sheldor,
level 85 blood ELF...
The Big Bang Theory Season 4, Episode 19