Elytheria's Pale Flame Torch

A flickering flame of pale blue appears in your hand in the shape of a spear-like torch, which remains there for the duration and harms neither you nor your equipment. If you are wielding a spellcasting focus while casting this spell, you can instead cause that focus to become harmlessly wreathed in pale blue flames. While flame-wreathed in this way, the focus is treated as the torch that would have appeared. The torch or its flames shed Bright Light in a 15 ft. radius and Dim Light for an additional 15 feet. 

When you cast this spell or as an action on a later turn within its duration, you can cause the spell's flames to spring forth in a 15 ft. long, 5 ft. wide line in a direction of your choice. Make a melee spell attack against all creatures in the line, making a separate attack roll for each target. On a hit, a target is dealt 1d10 fire damage. 

The spell ends if you drop the torch (or spellcasting focus) or if you cast the spell again.

Cantrip Upgrade. This spell's damage increases by 1d10 when you reach 5th level (2d10), 11th level (3d10), and 17th level (4d10).