Whenever Bone Dancer attacks and isn't blocked, you may put the top creature card of defending player's graveyard onto the battlefield under your control. If you do, Bone Dancer assigns no combat damage this turn.
Flying You may discard Circling Vultures any time you could cast an instant. At the beginning of your upkeep, sacrifice Circling Vultures unless you exile the top creature card of your graveyard.
Search your library and graveyard for five cards and exile the rest. Put the chosen cards on top of your library in any order. You lose half your life, rounded up.
At the beginning of your upkeep, Festering Evil deals 1 damage to each creature and each player. {B}{B}, Sacrifice Festering Evil: It deals 3 damage to each creature and each player.