Carian Greatsword

Conjure a magical greatsword and then deliver a sweeping or piercing blow as a part of the same action.

If you choose to make a sweeping attack, each creature in a 10 foot radius arc in front of you must make a dexterity saving throw.

If you choose to make a piercing attack, each creature in a 15 foot line in front of you must make a dexterity saving throw.

On a failed save each creature takes 2d10 plus your spellcasting modifier force damage. You can choose to repeat either attack as an action on each subsequent turn.

At higher levels. When you cast this spell using a spell slot of 4th level or higher the damage increases by 1d10 for each slot level above 3rd.

*original idea by Reddit user u/Hollow_Assassin*