Benthic Djinn

Mutagen (This creature may adapt as though
it didn't have any +1/+1 counters on it.)
Whenever Benthic Djinn adapts, draw a card.
Whenever a nontoken creature enters the battlefield under your control, adapt 1. (If
this creature has no +1/+1 counters on it, put a +1/+1 counter on it.)