Knowledge Exploitation [Morningtide] Mountain shuffle it into its owner's

shuffle it into its owner's library

they tap all lands with mana abilities they control and lose all unspent mana

each player discards their hand and returns to their hand each card they exiled this way

but my host would casually push it down before I could make out what it was

Knowledge Exploitation [Morningtide] Mountain shuffle it into its owner'sSet: 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.