Tethered Casting

You designate up to 2 non-magical objects within range, tethering them to your magic. For the duration, you can cast spells with a range of Self from these objects, causing the effects to emanate from them as if you were in their location. The objects must remain within 120 feet of each other.
   If a tethered object is destroyed or moved beyond 120 feet of the others, you can use your Bonus Action to designate a new non-magical object within range as a tether, provided it meets the original spell’s requirements.
   Using a Higher-Level Spell Slot. You can target one additional object for each slot level above 5.