Wattcastle is a Field 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, Wattcastle is Unlimited.
YGOPRODeck lists Wattcastle for these formats: Duel Links, TCG, OCG, Master Duel.
Wattcastle belongs to the Watt archetype—use that tag when searching for engine pieces and tech options.
A listed print of Wattcastle appears in Starstrike Blast (STBL-EN050) at Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Wattcastle is about $0.61 on TCGPlayer (prices change frequently).
