Polukranos, Worlds End

+2: Create a 0/0 green Hydra creature token and put X +1/+1 counters on it, where X is the number of creatures you do not control.
-X: Target creature you control gets +X/+X until end of turn and fights up to X-3 target creatures you do not control.
-9: You get an emblem with "Hydra creatures you control have trample and get +X/+X, where X is the number of counters on that creature."