Jahra, Mystic of Vryn

Flying, vigilance
Sorcery spells you cast cost {1}{w}{u} less to cast. (For example, if you cast a sorcery spell with mana cost {2}{w}{w}, it costs {1}{w} to cast.)
Spell mastery -- If there are two or more instant and/or sorcery cards in your graveyard, you and creatures you control have hexproof.