Cheapest priced copy (Final Fantasy: Through the Ages): $18.99 at Card Kingdom, near mint, their price list as of .
Kinnan, Bonder Prodigy 
Legendary Creature — Human Druid · 2/2 · Mythic · Ikoria: Lair of Behemoths · #338
Whenever you tap a nonland permanent for mana, add one mana of any type that permanent produced.
{5}{G}{U}: Look at the top five cards of your library. You may put a non-Human creature card from among them onto the battlefield. Put the rest on the bottom of your library in a random order.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
6 printings · $18.99 to $299.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Final Fantasy: Through the Ages (Seymour Guado) | 55 | Mythic | $18.99 | $159.99 |
| Ikoria: Lair of Behemoths | 192 | Mythic | $20.99 | $44.99 |
| Ikoria: Lair of Behemoths | 338 | Mythic | $34.99 | $299.99 |
| Ikoria: Lair of Behemoths Promos | 192p | Mythic | $29.99 | $84.99 |
| Ikoria: Lair of Behemoths Promos | 192s | Mythic | — | $59.99 |
| The List | IKO-192 | Mythic | $21.99 | — |
4 rulings from Wizards of the Coast
- 17 April 2020You’re “tapping a permanent for mana” only if you’re activating a mana ability of that permanent that includes the {T} symbol in its cost. A mana ability produces mana as part of its effect.
- 17 April 2020The types of mana are white, blue, black, red, green, and colorless.
- 17 April 2020Kinnan doesn’t care about any restrictions or riders the nonland permanent put on the mana it produced. The additional mana Kinnan produces won’t have any restrictions or riders.
- 17 April 2020The additional mana is produced by Kinnan, not by the nonland permanent that you tapped for mana.