Vampire Aristocrat | Magic: The Gathering
Formats Vampire Aristocrat is Legal in
Official Oracle Text for Vampire Aristocrat
Official Rulings for Vampire Aristocrat
10/1/2009 : 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 that creature has been dealt lethal damage, it'll be destroyed before you get a chance to sacrifice it.