Through the Fire and the Flames

You begin to play a power ballad that resonates unrelenting heat. As such, all allies within sight has their melee weapons and ranged missiles glow a bright orange/red and their weapon attacks now deal 1D6 extra damage. This effect only lasts until the bard loses concentration on this spell or stops playing their instrument. 

At Higher Levels. When you cast this spell using a spell slot of 3rd level or higher, the damage increases by 1D6 to a max of 2D6.