Seance Board

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.

• If 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.
• If a spell has {X} in its mana cost, use the value chosen for X when determining that spell’s mana value.