Ore-Rich Stalactite // Cosmium Catalyst (The Lost Caverns of Ixalan Commander)

Artifact // Artifact - Ore-Rich Stalactite: {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.) // Cosmium Catalyst: {1}{R}, {T}: Choose an exiled card used to craft this artifact at random. You may cast that card without paying its mana cost.