Desperate Ritual is a rare Instant — Arcane card from Secret Lair Drop (SLD), collector number 1984. Current market price: $20.87, 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.)