Split Focus

You have learned to split your attention between 2 spells, albeit diluting the results of both.

Increase your constitution by 1, to a maximum of 20.

You can concentrate on up to 2 spells at a time, each has its duration halved.

When you make a constitution saving throw to maintain concentration whilst you have 2 spells active, you only make 1 saving throw, but done at disadvantage.