Artificer's Sympathy

This staff can be wielded as a magic quarterstaff.

While wielding this staff you have advantage on Constitution saving throws made to maintain concentration on a single spell. 

With the power of the staff your mind is split in two allowing you to concentrate on two spells instead of one. As a bonus action you may invoke the power of the staff to maintain concentration on two spells at a time for a duration of 1 minute once per day. During this time you have disadvantage on saving throws made to maintain concentration. When you make a saving throw to maintain concentration it applies to both spells currently being maintained. If you cast a third spell requiring concentration you must end the effect of either of the two previous spells. After using the staff in this way the mental strain takes a huge toll on your body. You gain two levels of exhaustion. Exhaustion gained in this way can only be removed with a long rest. When you take a long rest, exhaustion gained from the staff's powers is removed.

Notes: Disadvantage: Constitution Saving Throws, Advantage: Constitution Saving Throws, Wizard, Control, Combat