Wailing of the Unchained Souls is a Continuous 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, Wailing of the Unchained Souls is Unlimited.
YGOPRODeck lists Wailing of the Unchained Souls for these formats: TCG, OCG, Master Duel.
Wailing of the Unchained Souls belongs to the Unchained archetype—use that tag when searching for engine pieces and tech options.
A listed print of Wailing of the Unchained Souls appears in 2020 Tin of Lost Memories Mega Pack (MP20-EN183) at Super Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Wailing of the Unchained Souls is about $0.24 on TCGPlayer (prices change frequently).
