Treacherous Vampire
{4}{B}
Creature — Vampire
Oracle Text
Flying
Whenever this creature attacks or blocks, sacrifice it unless you exile a card from your graveyard.
Threshold — As long as there are seven or more cards in your graveyard, this creature gets +2/+2 and has "When this creature dies, you lose 6 life."
Watch Out
Exile prevents dies triggersRules Note
'Dies' means 'put into a graveyard from the battlefield.' If a creature is exiled instead of dying (Swords to Plowshares, Rest in Peace), dies triggers won't fire. Tokens do trigger 'dies' abilities briefly before ceasing to exist.