🗿 notawikiAcross the Obelisk Codex · the answer, not the article

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item  Equipment · Accessories · Uncommon
Rarity UncommonType Accessories
[Every 2 turns] Reduce the cost of the highest cost Song spell in your hand by 1 until discarded.
Corrupted (purple) version
[Every turn] Reduce the cost of the highest cost Song spell in your hand by 1.