Caleb, Rewritten Archmage

Partner with Essek Thelyss, Shadowhand Legendary spells you cast cost {1} less to cast. Whenever you discard one or more cards for the first time each turn, draw that many cards. Exile two legendary cards from your graveyard: You may cast a legendary card from your graveyard this turn.{flavor}“I am of the Empire. But I am no friend to the {Lns}Empire.”