Awakened Ophis

Snakepit (Whenever another Naga or Snake enters
the battlefield under your control, this creature gets
+1/+0 and deathtouch until end of turn.)
Drown X (When this creature deals combat damage
to a player or planeswalker you may sacrifice it. If you
do, draw X cards, where X is this creatures power.)
Whenever one or more nontoken creatures you control die, put a green 0/1 snake creature
token with snakepit onto the battlefield.