Death blast

You hurl a ball of purple soul fire at a creature or object within range. Make a ranged spell attack against the target. On a hit, the target takes 2d20 fire damage. A flammable object hit by this spell ignites into pale blue flames if it isn't being worn or carried.

This spell's damage increases by 1d20 when you reach 5th level (3d20), 11th level (4d20), and 17th level (5d20).