Ballroom Brawlers 3WW
Creature - Human Warrior (Uncommon)
Whenever Ballroom Brawlers attacks, Ballroom Brawlers and up to one other target creature you control both gain your choice of lifelink or first strike until end of turn. End their dance, and they'll end your life.
I would've thought they'd make the dancefloor fight scene an instant or something.
If I am already committed to white in Limited then, sure, I'll pick this and drop one in. The toughness dodges most typical burn-based removal in Limited then turning a 3/5 and what I would hope would be another 3/x or 4/x creature into a first-striker or lifelinker should mark the beginning of the end for my opponent that game.