When this creature enters, create a Blood token (A Blood token is an artifact with ", , Discard a card, Sacrifice this artifact: Draw a card.").
, Sacrifice this creature: Target creature gets -X/-X until end of turn, where X is twice the number of Blood tokens (A Blood token is an artifact with ", , Discard a card, Sacrifice this artifact: Draw a card.") you control. Activate only as a sorcery.
Vintage
Standard
, 
, Discard a card, Sacrifice this artifact: Draw a card.")