Bloodthrone Vampire | Magic: The Gathering
Formats Bloodthrone Vampire is Legal in
Official Oracle Text for Bloodthrone Vampire
Official Rulings for Bloodthrone Vampire
6/15/2010 : If you sacrifice an attacking or blocking creature during the declare blockers step, it won't deal combat damage. If you wait until the combat damage step, but the creature you wish to sacrifice is dealt lethal damage, it'll be destroyed before you get a chance to sacrifice it.