Cheapest priced copy (Modern Horizons 3): $2.79 at Card Kingdom, near mint, their price list as of .
Emperor of Bones 
Creature — Skeleton Noble · 2/2 · Rare · Modern Horizons 3 · #90
At the beginning of combat on your turn, exile up to one target card from a graveyard.
{1}{B}: Adapt 2.
Whenever one or more +1/+1 counters are put on this creature, put a creature card exiled with this creature onto the battlefield under your control with a finality counter on it. It gains haste. Sacrifice it at the beginning of the next end step.
Legal inCommanderModernLegacyVintage
Not legal inBrawlStandardPioneerPauper
3 printings · $2.79 to $7.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Modern Horizons 3 | 90 | Rare | $2.79 | $3.49 |
| Modern Horizons 3 | 453 | Rare | $4.49 | $7.99 |
| Modern Horizons 3 Promos | 90s | Rare | — | $5.49 |
6 rulings from Wizards of the Coast
- 7 June 2024Finality counters aren't keyword counters, and a finality counter doesn't give any abilities to the permanent it's on. If that permanent loses its abilities and then would go to a graveyard, it will still be exiled instead.
- 7 June 2024If any permanent with a finality counter on it would go to a graveyard from the battlefield, exile it instead.
- 7 June 2024Finality counters don't stop permanents from going to zones other than the graveyard from the battlefield. For example, if a permanent with a finality counter on it would be put into its owner's hand from the battlefield, it does so normally.
- 7 June 2024You can always activate an ability that will cause a creature to adapt. As that ability resolves, if the creature has a +1/+1 counter on it for any reason, you simply won't put any +1/+1 counters on it.
- 7 June 2024Multiple finality counters on a single permanent are redundant.
- 7 June 2024If a creature somehow loses all of its +1/+1 counters, it can adapt again and get more +1/+1 counters.