Reverse of Neos 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, Reverse of Neos is Unlimited.
YGOPRODeck lists Reverse of Neos for these formats: Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
Reverse of Neos belongs to the Elemental HERO archetype—use that tag when searching for engine pieces and tech options.
A listed print of Reverse of Neos appears in Duelist Pack: Jaden Yuki 3 (DP06-EN015) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Reverse of Neos is about $0.10 on TCGPlayer (prices change frequently).
