Cheapest priced copy (Duskmourn: House of Horror): $0.35 at Card Kingdom, near mint, their price list as of .
Trial of Agony 
Sorcery · Uncommon · Duskmourn: House of Horror · #159
Choose two target creatures controlled by the same opponent. That player chooses one of those creatures. Trial of Agony deals 5 damage to that creature, and the other can't block this turn.
Legal inCommanderBrawlStandardPioneerModernLegacyVintage
Not legal inPauper
1 printing · $0.35 to $0.49 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duskmourn: House of Horror | 159 | Uncommon | $0.35 | $0.49 |
One ruling from Wizards of the Coast
- 20 September 2024If one of the two target creatures is an illegal target when Trial of Agony resolves, the remaining creature's controller must choose the remaining creature. Trial of Agony will deal 5 damage to that creature.