Cheapest priced copy (Kamigawa: Neon Dynasty): $0.35 at Card Kingdom, near mint, their price list as of .
Moonsnare Prototype 
Artifact · Common · Kamigawa: Neon Dynasty · #69
{T}, Tap an untapped artifact or creature you control: Add {C}.
Channel — {4}{U}, Discard this card: The owner of target nonland permanent puts it on their choice of the top or bottom of their library.
Legal inCommanderPioneerModernLegacyVintagePauper
Not legal inBrawlStandard
1 printing · $0.35 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Kamigawa: Neon Dynasty | 69 | Common | $0.35 | $0.99 |
3 rulings from Wizards of the Coast
- 18 February 2022Discarding the card is part of the cost to activate a channel ability.
- 18 February 2022The owner of that permanent chooses whether it goes on top or bottom. Other players get to know what they chose. In some unusual cases, including melded or mutated creatures, a permanent may consist of multiple cards. In those cases, the permanent's owner puts all cards on top or all cards on bottom. They choose the cards' relative order, and other players don't get to know that order.
- 18 February 2022If a channel ability requires a target, you may not activate it without a target just to discard the card.