Roshk, Curator of Ignorance

Temper (This creature gets +X/+X, where X is 3 minus the number of cards in your hand.)
Other creatures you control have fierce. (Whenever another creature you control attacks the player with the most cards in his or her hand, put a +1/+1 counter on it.)
{r}, Discard a Card: Other creatures you control get +1/+1 and gain haste until end of turn. Target opponent draws a card.