Cheapest priced copy (Duskmourn: House of Horror Commander): $3.49 at Card Kingdom, near mint, their price list as of .
Séance Board 
Artifact · Rare · Duskmourn: House of Horror Commander · #67
Morbid — At the beginning of each end step, if a creature died this turn, put a soul counter on this artifact.
{T}: Add X mana of any one color, where X is the number of soul counters on this artifact. Spend this mana only to cast instant, sorcery, Demon, and Spirit spells.
Legal inCommanderLegacyVintage
Not legal inBrawlStandardPioneerModernPauper
2 printings · $3.49 to $3.99 at Card Kingdom
| Set | Number | Rarity | Card Kingdom | Foil |
|---|---|---|---|---|
| Duskmourn: House of Horror Commander | 40 | Rare | $3.49 | — |
| Duskmourn: House of Horror Commander | 67 | Rare | $3.99 | — |
2 rulings from Wizards of the Coast
- 20 September 2024If no creatures have died in a turn by the time that turn's end step begins, Séance Board's first ability won't trigger at all. Causing a creature to die during the end step won't cause the ability to trigger.
- 20 September 2024If a spell has {X} in its mana cost, use the value chosen for X when determining that spell's mana value.