Last Resort is a Normal 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, Last Resort is Unlimited.
YGOPRODeck lists Last Resort for these formats: Common Charity, Edison, TCG, OCG, Master Duel.
A listed print of Last Resort appears in Duelist Pack: Jesse Anderson (DP07-EN022) at Common rarity.
Among markets shown on this page, the lowest listed snapshot for Last Resort is about $0.13 on TCGPlayer (prices change frequently).
