what magic the gathering cards are best?
['Sword of Feast and Famine. CMC: 3 (2 to equip) ... ', 'Ancient Tomb. CMC: 0. ... ', 'Emrakul, the Aeons Torn. CMC: 15. ... ', 'Command Tower. CMC: 0. ... ', 'Mana Drain. CMC: 2. ... ', 'Mana Vault. CMC: 1. ... ', 'Mana Crypt. CMC: 0. ... ', 'Sol Ring. CMC: 1.']