https://www.youtube.com/watch?v=NvY8DBmf6WA 緑巧技 動画見れないけど説明文に Rishkar's Expertise - 4GG Sorcery Draw cards equal to the greatest power among creatures you control. You may cast a card with converted mana cost 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."