Your search for "Acidic Sliver 13" revealed the following:
Acidic Sliver (STH) from Stronghold, available at 401 Games Canada. Rarity: Uncommon Finish: Normal Artist: Jeff Miracola Card Text:Each Sliver gains “2, Sacrifice this creature: This creature deals 2 damage to target creature or player.”
Acidic Sliver (Foil) (H09) from Premium Deck Series: Slivers, available at 401 Games Canada. Rarity: Uncommon Finish: Foil Artist: Jeff Miracola Card Text:All Slivers have "2, Sacrifice this permanent: This permanent deals 2 damage to target creature or player."