Two-Headed Sliver | Magic: The Gathering
Formats Two-Headed Sliver is Legal in
Official Oracle Text for Two-Headed Sliver
—Rukarumel, field journal
Official Rulings for Two-Headed Sliver
7/1/2013 : If the creature type of a Sliver changes so it’s no longer a Sliver, it will no longer be affected by its own ability. Its ability will continue to affect other Sliver creatures.