Succession Hydra

Trample
Succession Hydra enters the battlefield with X
+1/+1 counters on it.
{x}: Succession Hydra gains +X/+X until end of
turn. Activate this ability only once each turn.
Buried just under the surface, the Nrekkainnaz lives
buried. It was here before the jungle, and it will be
here long after it has been burned to ash.