Charge Shot

Shoot forth a potent blast of arcane energy that can be charged for greater impact. When the spell is cast you gain 1 charge. At the start each of your turns for the duration, you gain 1 charge. During you turn while the spell is in effect you may expand all your charges and make a spell attack roll on a target you can see within range. The spell attack roll has a +2 bonus to hit each charge consumed, on hit you deal 4d8 force damage for each charge consumed. The maximum charges you can have at once is equal to your spellcasting ability modifier and you cannot gain additional charges beyond it.

At higher levels: each spell level beyond the 3rd increases the damage of the blast by 1d8 force damage for each charge consumed.