Frightforged Hydra

Frightforged Hydra enters the battlefield with X +1/+1 counters where X is the amount of damage opponents have taken this turn.
Whenever Frightforged Hydra deals combat damage to an opponent, put that many +1/+1 counters on Frightforged Hydra.
Frightforged Hydra has trample as long as it has six or more +1/+1 counters on it.