Dark Hole 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, Dark Hole is Unlimited.
YGOPRODeck lists Dark Hole for these formats: GOAT, OCG GOAT, Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
Dark Hole belongs to the Hole archetype—use that tag when searching for engine pieces and tech options.
A listed print of Dark Hole appears in 2-Player Starter Deck: Yuya & Declan (YS15-ENY12) at Super Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Dark Hole is about $0.04 on Cardmarket (prices change frequently).
