Mountain ELF.
The Big Bang Theory Season 4, Episode 23
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
Not yours, mine, you punk-ass ELF.
The Big Bang Theory Season 6, Episode 6
...whereas an ELF
is an immortal, tall warrior.
The Big Bang Theory Season 1, Episode 6