Realm of Light is a Field 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, Realm of Light is Unlimited.
YGOPRODeck lists Realm of Light for these formats: Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
Realm of Light belongs to the Lightsworn archetype—use that tag when searching for engine pieces and tech options.
A listed print of Realm of Light appears in Light of Destruction (LODT-EN053) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Realm of Light is about $0.05 on Cardmarket (prices change frequently).
