Tails, of the cat power

+2: Target creature gains 3 +1/+1 counters.
+2: Target player gains x life, you gain double that amount of life. You chose x, x can be no more than five, and no less than one.
-15: All creatures you control with +1/+1 counters gain +3/+3 and trample until end of turn. At the end of your end step they get 2 +1/+1 counters.