Gruul Clans

You can't cast non-creature spells.
Creatures you control have riot (They enter the battlefield with your choice of a +1/+1 counter or
haste.)
Cards in your hand have Bloodrush - {1}{r}{g},
Discard this card: Target attacking creature gets
+X/+X until end of turn where X is this card's
converted mana cost.
Lands you control have "{t}: Add {r}{g}"