The advisor will grant a powerful spell that can be activated once every few turns. Depending on how your cards gathering is going, you can choose between Nostradamus, Heo Jun, Zhuge Liang and Leonardo Da Vinci. Use Leonardo Da Vinci, even though his skill activates only once every fourth turn. His damage is insane and he isn't as hard to acquire and Zhuge Liang, even if he is Rare quality.