Knowledge Exploitation [Morningtide] Darksteel Set: Amonkhet Invocations Type: Instant

Set: Amonkhet Invocations Type: Instant Mythic Cost: {U}{U} Counter target spell

each opponent loses 1 life and you gain that much life

Set: Modern Masters Type: Artifact Rare Cost: {X}{X} Chalice of the Void enters the battlefield with X charge counters on it

Set: Magic 2014 Type: Artifact Mythic Cost: {5} Ring of Three Wishes enters the battlefield with three wish counters on it

druid acolyte

Knowledge Exploitation [Morningtide] Darksteel Set: Amonkhet Invocations Type: InstantSet: Morningtide Type: Tribal Sorcery Rogue 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.