FOILCheapest priced copy (The List): $11.99 at Card Kingdom, near mint, their price list as of .
Klauth, Unrivaled Ancient 
Legendary Creature — Dragon · 4/4 · Mythic · Forgotten Realms Commander · #50
Flying, haste
Whenever Klauth attacks, add X mana in any combination of colors, where X is the total power of attacking creatures. Spend this mana only to cast spells. Until end of turn, you don't lose this mana as steps and phases end.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
4 printings · $11.99 to $32.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Forgotten Realms Commander | 50 | Mythic | — | $13.99 |
| Forgotten Realms Commander | 320 | Mythic | $21.99 | — |
| The List | AFC-50 | Mythic | $11.99 | — |
| Secret Lair Drop | 2499 | Mythic | $32.99 | $29.99Out of stock |
One ruling from Wizards of the Coast
- 23 July 2021Despite that fact that it can produce mana as it resolves, Klauth's triggered ability is not a mana ability because its trigger condition wasn't the activation or resolution of an activated mana ability. This means that it uses the stack and can be responded to. Notably, players can respond by destroying attacking creatures to reduce the amount of mana produced.