Dark Implosion

You create a spark of fire in your hands and hit the ground, creating an eruptition that beams from the area. You create a line 30 feet long and 5 feet wide blast wide from any direction at a point within range of the spell. Each creature in the line makes a Dexdarity saving throw or take 2d10 fire damege, the fire ignites flammable objects in the area that aren't being worn or carried. On a succes save the creature take half the damege.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d10 for each slot level above 1st.