Cheapest priced copy (Innistrad: Midnight Hunt): $0.99 at Card Kingdom, near mint, their price list as of .
Moonveil Regent 
Creature — Dragon · 4/4 · Mythic · Innistrad: Midnight Hunt Promos · #149p
Flying
Whenever you cast a spell, you may discard your hand. If you do, draw a card for each of that spell's colors.
When this creature dies, it deals X damage to any target, where X is the number of colors among permanents you control.
Legal inCommanderPioneerModernLegacyVintage
Not legal inBrawlStandardPauper
5 printings · $0.99 to $10.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Innistrad: Double Feature | 149 | Mythic | $1.79 | $10.99Out of stock |
| Innistrad: Midnight Hunt | 149 | Mythic | $0.99 | $0.99 |
| Innistrad: Midnight Hunt | 357 | Mythic | $1.49 | $0.99 |
| Innistrad: Midnight Hunt Promos | 149p | Mythic | $0.99 | $1.99 |
| Innistrad: Midnight Hunt Promos | 149s | Mythic | — | $1.29 |
4 rulings from Wizards of the Coast
- 24 September 2021If you cast a colorless spell, you may choose to discard your hand and draw no cards. Less great plan?
- 24 September 2021If you have no cards in hand as Moonveil Regent's first ability resolves, you may still choose to discard your hand. You'll just draw a card for each of that spell's colors. Great plan!
- 24 September 2021The colors of a nonmodal double-faced card that was cast with the disturb keyword ability are determined by its color indicator, not the mana cost on the front face of the card.
- 24 September 2021Moonveil Regent's last ability triggers even if you control no permanents that are one or more colors when it dies. The amount of damage is calculated as the ability resolves. Consider only the permanents you control at that time to determine how much damage Moonveil Regent deals.