Arcane Blade

The weapon you are holding is hardened and imbued with your arcane might. For the duration, you can use your spell casting ability for the attack and damage rolls of attacks using that weapon. The weapon also becomes magical, if it isn't already. The spell ends if you cast it again or if you let go of the weapon.

At Higher Levels: When you cast this spell using a slot of 4th or 5th level, the duration increases to 10 minutes. When you use a spell slot of 6th or 7th level, the duration increases to 1 hour. When you use a spell slot of 8th level or higher, the duration increases to 8 hours.