Fire Formation - Tensu 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, Fire Formation - Tensu is Unlimited.
YGOPRODeck lists Fire Formation - Tensu for these formats: Duel Links, Common Charity, TCG, OCG, Master Duel.
Fire Formation - Tensu belongs to the Fire Formation archetype—use that tag when searching for engine pieces and tech options.
A listed print of Fire Formation - Tensu appears in Astral Pack Four (AP04-EN012) at Super Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Fire Formation - Tensu is about $0.13 on Cardmarket (prices change frequently).
