Spellbound is a Quick-Play 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, Spellbound is Unlimited.
YGOPRODeck lists Spellbound for these formats: TCG, Master Duel.
A listed print of Spellbound appears in 25th Anniversary Tin: Dueling Heroes Mega Pack (MP23-EN151) at Ultra Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Spellbound is about $0.77 on Cardmarket (prices change frequently).
