Aether Lance

You gather a raw aether in your hand and expel it in a lance of power forming a line 30-foot-long and 5-foot-wide. Each creature in a line takes 8d4 force damage.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d4 for each slot level above 3rd.

Source: Kibble's Generic Elemental Spells