Chromatic Beam

Class(es)
Bard
Sorcerer
Warlock
Casting Time
1 Action
Range
Self
Area Shape
Line
Components:
a diamond worth at least 50 gp
Duration:
Instantaneous
Saving Throw
Dexterity Halves

Area: Line 30 feet long and 5 feet wide

You pour prismatic energy into a gemstone refracting the energy until it fires off as a chromatic beam in a direction you choose. Choose red (fire), orange (acid), yellow (lightning), green (poison), blue (cold), or indigo (thunder) for the color of beam you create. Each creature in the area takes 4d8 damage of the chosen type.

Cast at Higher Levels

The damage increases by 1d8 for each slot level above 2nd.

Source
Gate Pass Gazette

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