Embered Weapon

Flames lightly dance across the surface of the weapon you are holding, causing it to become imbued with power. For the duration, you can use your spellcasting ability instead of Strength or Dexterity for the attack and damage rolls of melee attacks using that weapon. In addition, you deal and additional 1d6 fire damage on a successful hit.

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

At Higher Levels. This Spell's damage increases to 1d8 when you reach 5th level, 1d10 when you reach 11th level, and 1d12 when you reach 17th level.