Really Eternal Rest is a Normal Trap Card.
Trap Cards are normally Set first and can be activated on a later turn, often in response to an action.
On the current TCG and OCG Forbidden & Limited lists tracked here, Really Eternal Rest is Unlimited.
YGOPRODeck lists Really Eternal Rest for these formats: GOAT, OCG GOAT, Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Really Eternal Rest appears in Dark Crisis (DCR-050) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Really Eternal Rest is about $0.02 on Cardmarket (prices change frequently).
