Magical Contract Door 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, Magical Contract Door is Unlimited.
YGOPRODeck lists Magical Contract Door for these formats: Duel Links, TCG, OCG, Master Duel.
A listed print of Magical Contract Door appears in Yu-Gi-Oh! The Dark Side of Dimensions Movie Pack (MVP1-EN020) at Ultra Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Magical Contract Door is about $0.14 on Cardmarket (prices change frequently).
