Stormrider

{r}: Stormrider gains haste until end of turn
Unstable 3 (at the beginning of your upkeep this creature does 3 damage to a random creature you control other than Stormrider. If there are no other creatures you control then it deals 3 damage to itself.)
When stormrider dies, you may have it deal 3 damage to one target creatuer.