Mikanko Promise 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, Mikanko Promise is Unlimited.
YGOPRODeck lists Mikanko Promise for these formats: TCG, OCG, Master Duel.
Mikanko Promise belongs to the Mikanko archetype—use that tag when searching for engine pieces and tech options.
A listed print of Mikanko Promise appears in Amazing Defenders (AMDE-EN035) at Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Mikanko Promise is about $0.06 on Cardmarket (prices change frequently).