Virulent Sliver is a common Creature — Sliver card from Premium Deck Series: Slivers (H09), collector number 2. Current market price: — (foil $0.92), TCGplayer market prices via Scryfall.
All Sliver creatures have poisonous 1. (Whenever a Sliver deals combat damage to a player, that player gets a poison counter. A player with ten or more poison counters loses the game.)