Cheapest priced copy (Ice Age): $13.99 at Card Kingdom, near mint, their price list as of .
Mystic Remora 
Enchantment · Common · Ice Age · #87
Cumulative upkeep {1} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
Whenever an opponent casts a noncreature spell, you may draw a card unless that player pays {4}.
Legal inCommanderLegacyVintagePauper
Not legal inBrawlStandardPioneerModern
7 printings · $13.99 to $94.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Dominaria Remastered | 59 | Rare | $15.99 | $16.99 |
| Dominaria Remastered | 288 | Rare | $14.99 | $27.99 |
| Dominaria Remastered | 420 | Rare | $16.99 | $24.99 |
| Ice Age | 87 | Common | $13.99 | — |
| Secret Lair Drop | 406 | Rare | $74.99 | $94.99 |
| Secret Lair Drop | 1842 | Rare | $15.99 | — |
| Avatar: The Last Airbender Eternal | 16 | Mythic | $27.99 | $59.99Out of stock |
2 rulings from Wizards of the Coast
- 2 October 2025Cumulative upkeep is a triggered ability that imposes an increasing cost on a permanent. "Cumulative upkeep [cost]" means "At the beginning of your upkeep, if this permanent is on the battlefield, put an age counter on this permanent. Then you may pay [cost] for each age counter on it. If you don't, sacrifice it."
- 2 October 2025Paying cumulative upkeep is always optional. If it's not paid, the permanent with cumulative upkeep is sacrificed. Partial payments of the total cumulative upkeep cost can't be made. For example, if Mystic Remora has three age counters on it when its cumulative upkeep ability triggers, it gets another age counter and then its controller chooses to either pay {4} or sacrifice it.