Bosul Gaxis

Flying, flanking, ingest, dredge 7
Whenever Bosul Gaxis attacks, each opponent
mills seven cards.
Threshold — Each opponent mills cards equal to
the number of cards in your graveyard instead if
seven or more cards are in your graveyard.
Appease {b}{g}{u}. (At the beginning of your upkeep,
sacrifice this permanent or pay {b}{g}{u})