Calibrated Blast is a rare Instant card from Modern Horizons 2 (MH2), collector number 456. Current market price: $0.33 (foil $0.38), TCGplayer market prices via Scryfall.
Reveal cards from the top of your library until you reveal a nonland card. Put the revealed cards on the bottom of your library in a random order. When you reveal a nonland card this way, Calibrated Blast deals damage equal to that card's mana value to any target. Flashback {3}{R}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)