Ore-Rich Stalactite // Cosmium Catalyst

{T}: Add {R}. Spend this mana only to cast an instant or sorcery spell.
Craft with four or more red instant and/or sorcery cards {3}{R}{R} ({3}{R}{R}, Exile this artifact, Exile the four or more from your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.) {1}{R}, {T}: Choose an exiled card used to craft this artifact at random. You may cast that card without paying its mana cost.