Eidelon of Bahamut

You summon an Eidelon of Bahamut at a point within 60 feet that you can see and facing a direction of your choice. The Eidelon uses a Radiant Breath attack and each creature in a 20 foot cone must make a Constitution saving throw. A creature takes 8d8 radiant damage on a failed save, or half as much damage on a successful one.

At Higher Levels. When you cast this spell using a spell slot of 6th level or higher, the damage increases by 1d8 for each slot level above 5th.