Cheapest priced copy (Teenage Mutant Ninja Turtles): $0.35 at Card Kingdom, near mint, their price list as of .
Grounded for Life 
Instant · Common · Teenage Mutant Ninja Turtles · #7
This spell costs {3} less to cast if it targets a tapped creature.
Destroy target creature.
Legal inCommanderBrawlStandardPioneerModernLegacyVintagePauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Teenage Mutant Ninja Turtles | 7 | Common | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 27 January 2026To determine the total cost of a spell, start with the mana cost or alternative cost you're paying, add any cost increases, then apply any cost reductions (such as that of Grounded for Life's first ability). The mana value of the spell remains unchanged, no matter what the total cost to cast it was.