Divine Weapon

The simple or martial Weapon you are holding is imbued with divine power. For the duration, you can use your spellcasting ability instead of Strength or Dexterity for the attack and damage rolls of melee, thrown or ranged attacks using the weapon, and the weapon's damage die becomes a 1d8. The damage is the weapons normal type or Radiant, players choice. The weapon also becomes magical, if it isn't already. The weapon's other magical properties are still applied. 

The spell ends if you cast it again or if you let go of the weapon.

Cantrip Upgrade. The damage die changes when you reach levels 5 (1d10), 11 (1d12), and 17 (2d8).