Focused Multitasker.

Focused Multitasker

Prerequisite: Spellcasting or Pact Magic feature

You are able to concentrate on two spells simultaneously. When you do, you suffer the following penalties:

• You can’t cast spells or make weapon attacks.
• The minimum DC for Constitution saving throws you make to maintain your concentration when you take damage is 15.
• At the start of each of your turns in combat, you must succeed on a DC 10 Constitution saving throw or lose concentration on your choice of one of the two spells.