FOILCheapest priced copy (Modern Horizons): $0.35 at Card Kingdom, near mint, their price list as of .
Tempered Sliver 
Creature — Sliver · 2/2 · Rare · Secret Lair Drop · #657
Sliver creatures you control have "Whenever this creature deals combat damage to a player, put a +1/+1 counter on it."
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
2 printings · $0.35 to $2.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Modern Horizons | 183 | Uncommon | $0.35 | $2.49 |
| Secret Lair Drop | 657 | Rare | — | $0.69 |