Cheapest priced copy (Final Fantasy): $0.35 at Card Kingdom, near mint, their price list as of .
Thunder Magic 
Instant · Common · Final Fantasy · #165
Tiered (Choose one additional cost.)
• Thunder — {0} — Thunder Magic deals 2 damage to target creature.
• Thundara — {3} — Thunder Magic deals 4 damage to target creature.
• Thundaga — {5}{R} — Thunder Magic deals 8 damage to target creature.
Legal inCommanderBrawlStandardPioneerModernLegacyVintagePauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Final Fantasy | 165 | Common | $0.35 | $0.49 |
6 rulings from Wizards of the Coast
- 6 June 2025You must choose exactly one of the listed modes and pay its associated additional cost in order to cast a spell with tiered.
- 6 June 2025If a spell with tiered is copied, the effect that creates the copy may allow you to choose new targets. You cannot choose a new mode.
- 6 June 2025If a mode requires a target, you can select that mode only if there's a legal target available. Ignore the targeting requirements for modes you don't choose.
- 6 June 2025The mana value of a spell with tiered is determined only by its mana cost (in the upper right corner of the card). It doesn't matter which mode you choose or which additional costs you pay, including any additional costs imposed by other effects.
- 6 June 2025If an effect allows you to cast a spell with tiered "without paying its mana cost," you must still choose exactly one mode and pay the associated additional cost.
- 6 June 2025You choose the mode as you cast the spell with tiered. Once the mode is chosen, it can't be changed.