Unwavering Bond 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, Unwavering Bond is Unlimited.
YGOPRODeck lists Unwavering Bond for these formats: TCG, OCG, Master Duel.
A listed print of Unwavering Bond appears in Pendulum Evolution (PEVO-EN043) at Super Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Unwavering Bond is about $0.12 on Cardmarket (prices change frequently).
