
Flying
At the beginning of your upkeep, mill a card.
Threshold — As long as there are seven or more cards in your graveyard, this creature gets +1/+1 and has "At the beginning of your end step, exile two cards from your graveyard."
Bloodcurdler has 1 printing, first in Odyssey (2001). EDHREC ranks it #27,370 among Commander cards.
Cards that show up in the same decks on EDHREC.