Branch! 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, Branch! is Unlimited.
YGOPRODeck lists Branch! for these formats: Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Branch! appears in Dark Revelation Volume 4 (DR04-EN106) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Branch! is about $0.03 on Cardmarket (prices change frequently).
