Samantha, Transer of Genders

Samantha, Transer of Genders enters the battlefield with {x} +1/+1 counters.
Each Snake you control gets +1/+1 and Forestwalk.
{t}: Put a Snek counter on target creature, it is a snake in addition to it's other types
{g/u}{g/w}{t}: You gain {x} life and draw {x} cards, where x is the number of different creature types amongst creatures you control.