Primal Challenge

If {r} was spent to cast Primal Challenge, creatures you control gain +2/+0 and Trample until end of turn. If {g} was spent to cast Primal Challenge, creatures you control gain +0/+2 until end of turn and must be blocked by exactly one creature this turn. (If you spent {r}{g}, do both)
If {r} and {g} were spent to cast Primal Challenge, put a +1/+1 counter on each creature you control.