Zaxara, the Exemplary 
Legendary Creature — Nightmare Hydra
Deathtouch
: Add two mana of any one color.
Whenever you cast a spell with 
in its mana cost, create a 0/0 green Hydra creature token, then put X +1/+1 counters on it.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL