Demise of the Land is a Quick-Play 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, Demise of the Land is Unlimited.
YGOPRODeck lists Demise of the Land for these formats: Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Demise of the Land appears in Light of Destruction (LODT-EN047) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Demise of the Land is about $0.13 on Cardmarket (prices change frequently).
