Magical Multitasker

Thanks to your extensive practice of Concentration spells, you may now concentrate on two spells at once.

When you choose to cast a second Concentration spell, you may roll a Constitution saving throw to maintain Concentration on the first spell's effects. If the second spell is a duplicate of the first, you may roll the saving throw with advantage. The DC equals 10 plus the spell level.

If your Concentration on one spell would be broken by a failed save, you instead lose Concentration on both spells.