Carista, Death's Venom

+1: Create two 2/2 grean/blue/black snake hydra tokens with deathtouch and trample.
-3: Target snake or hydra gains deathtouch and +4/+4 till end of turn. Target snake or hydra fights two target creatures you don't control
-7: Create an emblem that has "Hydras and snakes get +4/+4, deathtouch,vigilance,trample and hexproof"