The Hail Hydra

Infamous 3 (When this creature enters the battlefield, create three 0/0 green Hydra Head creature tokens.)
Hydra Head creatures you control get +2/+1.
Whenever a Hydra Head dies, create two 0/0
green Hydra Head creature tokens.
The Hail Hydra gets +1/+1 for each Hydra Head creature you control.