Cheapest priced copy (Commander Masters): $0.35 at Card Kingdom, near mint, their price list as of .
Clot Sliver 
Creature — Sliver · 1/1 · Common · Commander Masters · #861
All Slivers have "{2}: Regenerate this permanent."
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
3 printings · $0.35 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Masters | 861 | Common | $0.35 | — |
| Premium Deck Series: Slivers | 5 | Common | — | $0.99 |
| Tempest | 112 | Common | $0.35 | — |
2 rulings from Wizards of the Coast
- 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.