Find the best Pioneer decks for Benthic Biomancer, it's winrate, popularity and the MTG Arena formats where it is legal!
: Adapt 1. (If this creature has no +1/+1 counters on it, put a +1/+1 counter on it.)
Whenever one or more +1/+1 counters are put on this creature, draw a card, then discard a card.
