Summoning Curse is a Continuous 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, Summoning Curse is Unlimited.
YGOPRODeck lists Summoning Curse for these formats: Duel Links, Common Charity, TCG, OCG, Master Duel.
A listed print of Summoning Curse appears in Duelist Revolution (DREV-EN061) at Short Print rarity.
Among markets shown on this page, the lowest listed snapshot for Summoning Curse is about $0.02 on Cardmarket (prices change frequently).
