Tuner's Scheme is a Continuous 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, Tuner's Scheme is Unlimited.
YGOPRODeck lists Tuner's Scheme for these formats: TCG, OCG, Master Duel.
A listed print of Tuner's Scheme appears in Absolute Powerforce (ABPF-EN077) at Super Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Tuner's Scheme is about $1.88 on Amazon (prices change frequently).
