Crazed Daredevils

Haste, Unblockable
During the beginning of your upkeep, flip a coin. If you win the flip, Crazed Daredevils gains +2/+0 until end of turn. If you lose the flip, sacrifice Crazed Daredevils and it deals 2 damage to you.
"YAAAHHHHOOOOOO! WHAT A RUSH!"