
This creature gets +3/+0 as long as there are ten or more cards in a single graveyard.
This creature can't be blocked as long as you control an Ashiok planeswalker.
Swimmer in Nightmares has 1 printing, first in Theros Beyond Death (2020). EDHREC ranks it #29,234 among Commander cards. It has 2 official rulings.
Cards that show up in the same decks on EDHREC.