Desperate Ritual is a uncommon Instant — Arcane card from Modern Masters (MMA), collector number 110. Current market price: $7.77 (foil $17.45), TCGplayer market prices via Scryfall.
Add {R}{R}{R}. Splice onto Arcane {1}{R} (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)