Goarg, Changeling Lord

+2: Choose a creature type, creature's you control are that type in addition to their other types
-3: Create a 0/0 green Ooze token with changeling. Put X +1/+1 counters on it, where X is the number of loyalty counters on Goarg
-5: You get an emblem that says "Creatures you control have changeling" and "At the beginning of your end step create a 1/1 green Ooze token"