Valdris, the Ruination

Valdris, the Ruination enters the battlefield with
X plus one +1/+1 counters on it.
Each other Hydra creature you control enters
the battlefield with an additional X +1/+1
counters on them.
Remove a +1/+1 counter from a Hydra creature
you control: That card gains indestructible and hexproof until end of turn. Tap it.