Cheapest priced copy (Kamigawa: Neon Dynasty): $0.99 at Card Kingdom, near mint, their price list as of .
Colossal Skyturtle 
Enchantment Creature — Turtle · 6/5 · Uncommon · The List · #NEO-216
Flying, ward {2}
Channel — {2}{G}, Discard this card: Return target card from your graveyard to your hand.
Channel — {1}{U}, Discard this card: Return target creature to its owner's hand.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
2 printings · $0.99 to $3.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Kamigawa: Neon Dynasty | 216 | Uncommon | $0.99 | $3.49 |
| The List | NEO-216 | Uncommon | — | — |
2 rulings from Wizards of the Coast
- 18 February 2022If a channel ability requires a target, you may not activate it without a target just to discard the card.
- 18 February 2022Discarding the card is part of the cost to activate a channel ability.