Thunder God Strike

As a bonus action, you conjure a morningstar made of lightning. For the duration, you can use this morningstar to make a melee attack using your spellcasting ability instead of strength. The weapon has a 5ft. reach and does 2d8 Lightning damage instead of blunt damage.

Any time during the duration, you can use your action to hurl the weapon up to 60ft and ending the spell. All creatures within 10ft. of the target must make a dexterity saving throw against your spell dc. On a failed save the target takes 3d10 lightning damage or half on a successful save. Casting this spell at a 4th level will increase this damage by 1d10 and another 1d10 for every other level beyond the 4th.