Mindsap Ophidian

Whenever Mindsap Ophidian deals combat damage to a player, it gains "Mindsap Ophidian doesn't untap during your untap
step. You may pay {0} to have it lose this ability."
At the beginning of your upkeep, if
Mindsap Ophidian is tapped, put a +1/+1 counter on it and draw a card.