Cheapest priced copy (Duskmourn: House of Horror): $0.49 at Card Kingdom, near mint, their price list as of .
Balustrade Wurm 
Creature — Wurm · 5/5 · Rare · Duskmourn: House of Horror · #168
This spell can't be countered.
Trample, haste
Delirium — {2}{G}{G}: Return this card from your graveyard to the battlefield with a finality counter on it. Activate only if there are four or more card types among cards in your graveyard and only as a sorcery.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
4 printings · $0.49 to $0.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duskmourn: House of Horror | 168 | Rare | $0.49 | $0.49 |
| Duskmourn: House of Horror | 319 | Rare | $0.49 | $0.49 |
| Duskmourn: House of Horror Promos | 168p | Rare | $0.49 | $0.49 |
| Duskmourn: House of Horror Promos | 168s | Rare | — | $0.99 |
4 rulings from Wizards of the Coast
- 20 September 2024Multiple finality counters on a single permanent are redundant.
- 20 September 2024If a permanent with a finality counter on it would be put into a graveyard from the battlefield, exile it instead.
- 20 September 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.
- 20 September 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.