Merciful Machine Angel 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, Merciful Machine Angel is Unlimited.
YGOPRODeck lists Merciful Machine Angel for these formats: Duel Links, Common Charity, TCG, OCG, Master Duel.
Merciful Machine Angel belongs to the Cyber Angel archetype—use that tag when searching for engine pieces and tech options.
A listed print of Merciful Machine Angel appears in Legendary Duelists: Season 2 (LDS2-EN092) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Merciful Machine Angel is about $0.05 on Cardmarket (prices change frequently).
