Arcane Warrior

By expending a single spell slot, change strength to your primary spellcasting ability when performing melee attacks. This lasts a number of hours equal to the level of spell expended. At character level 10, gain the following additional bonuses: When Arcane Warrior is active, gain an armor bonus to AC and damage bonus on melee attacks equal to the level of the spell slot expended, maximum +4. In addition, all of your melee attack damage counts as Force Damage.