Forger's Foundry

{T}: Add {U}. When you spend this mana to cast an instant or sorcery spell with mana value 3 or less, you may exile that spell instead of putting it into its owner's graveyard as it resolves. {3}{U}{U}, {T}: You may cast any number of spells from among cards exiled with this artifact without paying their mana costs.

Activate only as a sorcery.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6o4ol829hvpb1hux8qp8ra.