FOILCheapest priced copy (Time Spiral Remastered): $0.69 at Card Kingdom, near mint, their price list as of .
Harmonic Sliver 
Creature — Sliver · 1/1 · Uncommon · The List · #TSP-240
All Slivers have "When this permanent enters, destroy target artifact or enchantment."
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
5 printings · $0.69 to $15.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Commander Masters | 924 | Uncommon | $1.99 | — |
| The List | TSP-240 | Uncommon | — | $1.99 |
| Secret Lair Drop | 663 | Rare | — | $15.99 |
| Time Spiral | 240 | Uncommon | $1.29 | $6.99 |
| Time Spiral Remastered | 254 | Uncommon | $0.69 | $3.49 |
4 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.
- 19 March 2021The controller of the Sliver that enters the battlefield controls the triggered ability for that Sliver and chooses what to destroy, not necessarily the controller of Harmonic Sliver.
- 19 March 2021The ability Harmonic Sliver grants itself triggers when it enters the battlefield.