Eldritch Burst

You cast eldritch energy at one creature or object within range. Make a ranged attack roll against the target. On a hit, the target takes 1d8 force damage. If you roll an 8 on a d8 for this spell, you can roll another d8, and add it to the damage. Whenever you cast this spell, the maximum number of these d8s you can add to this spell's damage equals your spellcasting modifier.
You can cast multiple eldritch energies when you reach higher levels: two at 5th level, three at 11th level, and four at 17th level. You can direct the energy at the same target or at different ones. Make a separate attack roll for each energy.