Arcane Supremacy (Charisma)

You've become an exemplar of arcane power on your spells to concentrate on multiple:

• When you cast a concentration spell, if you are already concentrating on one concentration spell, you do not lose concentration of that spell; instead you gain one level of exhaustion and have concentration on both spells. You can't concentrate on more than two spells at a time in this way. You can use this feature a number of times equal to your spellcasting ability modifier (minimum of 1), and you regain all expended uses when you finish a long rest.
• Concentrating on two concentration spells at once is taxing to the mind. Whenever you are concentrating on more than one spell at a time, you have disadvantage on Constitution saving throw to maintain your concentration.