The Dark Urge

Commander creatures you own have "Whenever this creature attacks, roll a D20. If you roll a number that is less than its power, exile target creature you control, and this creature gains deathtouch and trample until end of turn.

{x}{t}: Sacrifice a creature you control. This creature gains +X/+X.

{x}{t}: Remove X counters from this creature. You may distribute them among up to four other legendary creatures you control."