Volatile Burst

You conjure a beam of very unpredictable magical power. Make a ranged spell attack against a creature you can see within range. On a hit, the target takes 4d20 force damage. Could do a little or a lot!

Also, if you have access to the Wild Magic Surge class ability, and you roll more than 45 points of damage when casting this spell, you can choose to also roll on the Wild Magic Surge table to create a random magical effect.

When you cast this spell using a spell slot of 6th level, the damage increases to 5d20. When you cast this spell using a spell slot of 8th level, the damage increases to 6d20.