Bloodvial Purveyor

Flying, trample Whenever an opponent casts a spell, that player creates a Blood token. (It's an artifact with "1, T, Discard a card, Sacrifice this artifact: Draw a card.") Whenever Bloodvial Purveyor attacks, it gets +1/+0 until end of turn for each Blood token defending player controls. This card has received an errata which is displayed in red.