Knowledge Exploitation [Morningtide] Mountain {T}: Prevent the next 2

{T}: Prevent the next 2 damage that would be dealt to target legendary creature this turn

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

Set: Arena League 1999 Type: Creature — Phyrexian Imp Rarity: Rare Cost: {B}{B} Flying

Set: Friday Night Magic 2005 Type: Artifact Rarity: Rare Cost: {4} {1}

Knowledge Exploitation [Morningtide] Mountain {T}: Prevent the next 2Set: 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.