
Flying
When this creature enters, mill three cards. (Put the top three cards of your library into your graveyard.)
Threshold — This creature gets +2/+1 as long as there are seven or more cards in your graveyard.
Billowing Shriekmass has 1 printing, first in Foundations (2024). EDHREC ranks it #17,779 among Commander cards. It appears most in Winter, Tormented Loner decks (17 on EDHREC). It has 1 official ruling.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.