Cheapest priced copy (Time Spiral): $0.69 at Card Kingdom, near mint, their price list as of .
Plague Sliver 
Creature — Sliver · 5/5 · Rare · Time Spiral · #124
All Slivers have "At the beginning of your upkeep, this permanent deals 1 damage to you."
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
3 printings · $0.69 to $14.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Secret Lair Drop | 633 | Rare | — | $1.99 |
| Secret Lair Drop | 633Φ | Rare | — | $14.99 |
| Time Spiral | 124 | Rare | $0.69 | $4.49 |
3 rulings from Wizards of the Coast
- 25 September 2006Each Sliver deals damage to its controller (not to Plague Sliver’s controller).
- 1 July 2013Abilities that Slivers grant, as well as power/toughness boosts, are cumulative. However, for some abilities, like flying, having more than one instance of the ability doesn’t provide any additional benefit.
- 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.