STEP & COMPLEAT FOILCheapest priced copy (Time Spiral Remastered): $0.35 at Card Kingdom, near mint, their price list as of .
Virulent Sliver 
Creature — Sliver · 1/1 · Rare · Secret Lair Drop · #659Φ
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.)
Legal inCommanderModernLegacyVintagePauper
Not legal inBrawlStandardPioneer
6 printings · $0.35 to $29.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Future Sight | 155 | Common | $0.59 | $5.99 |
| Premium Deck Series: Slivers | 2 | Common | — | $0.99 |
| The List | FUT-155 | Common | $0.49 | — |
| Secret Lair Drop | 659 | Rare | — | $2.79 |
| Secret Lair Drop | 659Φ | Rare | — | $29.99 |
| Time Spiral Remastered | 246 | Common | $0.35 | $1.49 |
4 rulings from Wizards of the Coast
- 1 July 2013If 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.
- 19 March 2021Poisonous 1 causes the player to get just one poison counter when a Sliver deals combat damage to them, no matter how much damage that Sliver dealt.
- 19 March 2021A player with ten or more poison counters loses the game as a state-based action, even if no permanents with poisonous are on the battlefield.
- 19 March 2021If a creature has multiple instances of poisonous, each triggers separately.