Pulmonic Sliver | Magic: The Gathering
Formats Pulmonic Sliver is Legal in
Official Oracle Text for Pulmonic Sliver
All Slivers have "If this permanent would be put into a graveyard, you may put it on top of its owner's library instead."
Official Rulings for Pulmonic 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.