Zaxara, Mother of the Vile

Deathtouch, Trample
Zaxara, Mother of the Vile
enters the battlefield with X +1/+1 counters on it
Whenever you cast a spell
or use a ability with X in it's mana cost
Create a X/X Vile Spawn
Green and Black Hydra token.
All Hydra creatures Gain Deathouch