Earthbound Wave is a Counter Trap Card.
Trap Cards are normally Set first and can be activated on a later turn, often in response to an action.
On the current TCG and OCG Forbidden & Limited lists tracked here, Earthbound Wave is Unlimited.
YGOPRODeck lists Earthbound Wave for these formats: Duel Links, Common Charity, Edison, TCG, OCG, Master Duel.
Earthbound Wave belongs to the Earthbound archetype—use that tag when searching for engine pieces and tech options.
A listed print of Earthbound Wave appears in Legendary Collection 5D's Mega Pack (LC5D-EN158) at Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Earthbound Wave is about $0.02 on Cardmarket (prices change frequently).
