Bloodvial Purveyor

Condition: Near Mint
Color: Black
Card Text: 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 for each Blood token defending player controls.
Rarity: R
Cost: 2BB
Pow/Tgh: 5/6
Card Type: Creature - Vampire
Name: Bloodvial Purveyor
Finish: Regular
Card Number: 098/277 
Set Name: Innistrad: Crimson Vow