Kalonian Hydra

卡隆尼亚多头龙 (Kalonian Hydra) (zhs)

Creature - Hydra (CMC 5)
Trample
Kalonian Hydra enters the battlefield with four +1/+1 counters on it.
Whenever Kalonian Hydra attacks, double the number of +1/+1 counters on each creature you control.