Cheapest priced copy (Ravnica Allegiance): $0.35 at Card Kingdom, near mint, their price list as of .
Stony Strength 
Instant · Common · Ravnica Allegiance · #143
Put a +1/+1 counter on target creature you control. Untap that creature.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
2 printings · $0.35 to $0.79 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Foundations Jumpstart | 720 | Common | $0.39 | — |
| Ravnica Allegiance | 143 | Common | $0.35 | $0.79 |
One ruling from Wizards of the Coast
- 25 January 2019Stony Strength can target any creature you control, even one that's already untapped.