Knowledge Exploitation [Morningtide] Starter 1999 Set: Commander 2017 Type: Instant

Set: Commander 2017 Type: Instant Rarity: Rare Cost: {R}{W}{B} Crackling Doom deals 2 damage to each opponent

you may sacrifice an artifact

Sacrifice Ratchet Bomb: Destroy each nonland permanent with converted mana cost equal to the number of charge counters on Ratchet Bomb

and then make your wager

"How easily your flames are quenched

Knowledge Exploitation [Morningtide] Starter 1999 Set: Commander 2017 Type: InstantSet: Morningtide Type: Tribal Sorcery Rogue Rarity: Rare Cost: {5}{U}{U} Prowl {3}{U} (You may cast this for its prowl cost if you dealt combat damage to a player this turn with a Rogue.) Search target opponent's library for an instant or sorcery card. You may cast that card without paying its mana cost. Then that player shuffles their library.