Cheapest priced copy (Commander Masters): $0.49 at Card Kingdom, near mint, their price list as of .
Necrotic Sliver 
Creature — Sliver · 2/2 · Uncommon · Planar Chaos · #159
All Slivers have "{3}, Sacrifice this permanent: Destroy target permanent."
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
7 printings · $0.49 to $15.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Forgotten Realms Commander | 188 | Uncommon | $0.69 | — |
| Commander Masters | 932 | Uncommon | $0.49 | — |
| Premium Deck Series: Slivers | 20 | Uncommon | — | $1.49 |
| Planar Chaos | 159 | Uncommon | $0.99 | $8.99 |
| The List | PLC-159 | Uncommon | $0.49 | — |
| Secret Lair Drop | 666 | Rare | — | $15.99 |
| Time Spiral Remastered | 258 | Uncommon | $0.59 | $3.49 |
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.