Cheapest priced copy (Magic 2014): $1.99 at Card Kingdom, near mint, their price list as of .
Manaweft Sliver 
Creature — Sliver · 1/1 · Uncommon · Magic 2014 · #184
Sliver creatures you control have "{T}: Add one mana of any color."
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
5 printings · $1.99 to $6.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Masters | 900 | Uncommon | $2.79 | — |
| Magic 2014 | 184 | Uncommon | $1.99 | $4.49 |
| The List | CMM-900 | Uncommon | $2.79 | — |
| The List | M14-184 | Uncommon | — | $1.99 |
| Secret Lair Drop | 650 | Rare | — | $6.49 |
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 you change the creature type of a Sliver you control 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 you control.