O - Oversoul is a Normal Spell Card.
Spell Cards are usually activated from the hand on your turn unless their type gives another timing window.
On the current TCG and OCG Forbidden & Limited lists tracked here, O - Oversoul is Unlimited.
YGOPRODeck lists O - Oversoul for these formats: Duel Links, Common Charity, Edison, Speed Duel, TCG, OCG, Master Duel.
O - Oversoul belongs to the Elemental HERO archetype—use that tag when searching for engine pieces and tech options.
A listed print of O - Oversoul appears in Dark Revelation Volume 4 (DR04-EN221) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for O - Oversoul is about $0.09 on Cardmarket (prices change frequently).
