Molten Whirlwind Wall is a Continuous 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, Molten Whirlwind Wall is Unlimited.
YGOPRODeck lists Molten Whirlwind Wall for these formats: Duel Links, TCG, OCG, Master Duel.
Molten Whirlwind Wall belongs to the Laval archetype—use that tag when searching for engine pieces and tech options.
A listed print of Molten Whirlwind Wall appears in Duel Terminal 5a (DT05-EN050) at Duel Terminal Normal Parallel Rare rarity.
Among markets shown on this page, the lowest listed snapshot for Molten Whirlwind Wall is about $0.09 on Cardmarket (prices change frequently).
