Royal Tribute 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, Royal Tribute is Unlimited.
YGOPRODeck lists Royal Tribute for these formats: GOAT, OCG GOAT, Common Charity, Edison, TCG, OCG, Master Duel.
Royal Tribute belongs to the Gravekeeper's archetype—use that tag when searching for engine pieces and tech options.
A listed print of Royal Tribute appears in Dark Revelation Volume 1 (DR1-EN039) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Royal Tribute is about $1.79 on TCGPlayer (prices change frequently).
