Elemental Portal

Conjure a tiny one way portal at your location and in another location you can see within 120ft. Creatures by the active portal can shoot through it, and if a melee attack is made within 5ft of the portal the attack may attack through the portal and hit a creature within 5ft of the other active portal.

When you conjure the portal choose an elemental type. Any attack or spell attack that enters the portal comes out the other end imbued with the chosen element. For example, a fireball fired through an ice portal will be augmented into an ice based spell.

You may use another bonus action while concentrating to do the following. Change one of the portals locations, change the elemental type of the portal.