Hissur, Primal Envoy

Trample
All Hydra spells you cast cost {2} less to cast.
At the beginning of your upkeep create
X 1/1 green Snake creature tokens where X is the number of Hydra creatures you control.
{g}, Sacrifice X Creatures, search your library for
a Hydra creature whose power is equal to or less
than sacrificed creatures and put it onto the battlefield. That creature gains indestructible and hexproof until your next turn.