Dark Contract with the Gate 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, Dark Contract with the Gate is Unlimited.
YGOPRODeck lists Dark Contract with the Gate for these formats: Duel Links, Common Charity, TCG, OCG, Master Duel.
Dark Contract with the Gate belongs to the D/D archetype—use that tag when searching for engine pieces and tech options.
A listed print of Dark Contract with the Gate appears in 2016 Mega-Tin Mega Pack (MP16-EN168) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Dark Contract with the Gate is about $0.50 on TCGPlayer (prices change frequently).
