Rishkar's Expertise [Aether Revolt Prerelease Promos] Magic 2013 but used to repress entire

but used to repress entire empires

Very fancy

if you haven't added mana with this ability this turn

Set: Limited Edition Alpha Type: Enchantment Rare Cost: {R}{R} Whenever one or more creatures you control attack

Rishkar's Expertise [Aether Revolt Prerelease Promos] Magic 2013 but used to repress entireSet: Aether Revolt Prerelease Promos Type: Sorcery Rarity: Rare Cost: {4}{G}{G} Draw cards equal to the greatest power among creatures you control. You may cast a spell with mana value 5 or less from your hand without paying its mana cost. "Control the Great Conduit? You might as well try to divert a river with your hands."