Your Favorite Ability

[Ralamus]

Sure we've all seen threads on favorite class, NPC, boss, etc.

But how about your all time favorite Ability OR Talent? Anything from Fan of Knives to Hot Streak.
It can also be any old version of whatever there is now, or maybe something that no longer exists, and it can be for any class not just what you play.

Personally I've always liked Cyclone, Blind, and Ice Lance. The possibilities with using cyclone to either just cc or prevent heals/innervates i always liked, blind feels rogueish, and I'm not quite sure why but i've always thought ice lance was a really cool ability.

Cataclysm abilities count too.