Chrysalis, the Swarm Queen

Flying, hexproof
When Chrysalis, the Swarm Queen enters the battlefield, you create X 2/2 black and green
Changeling creature tokens named Changeling
Drone, where X is the amount of mana spent to
cast Chrysalis, the Swarm Queen.
Whenever a creature dies, put a +1/+1 counter
on each Changeling creature you control.