Aegrona

You take an additional +2 damage from magical sources and have disadvantage on any check to resist magic. You have advantage on Mighty. In lieu of moving on your turn, you can glide or leap the same distance with your wings.

You may cast the spells Dispel Magic and Counterspell. As long as you have MP (and at the GM's discretion), you can create minor, illusory cantrips related to your maleficence. Such cantrips are instantaneous and harmless, and cannot duplicate the effects of any other spells.

You've trained to cast spells under great duress and in the battlefield. Your concentration when casting spells in combat cannot be broken, and you may reduce the magic penalty conferred by armor or shields by 2. Once per turn, you may make an attack as a bonus action with disadvantage on the same turn that you cast a spell.