Empower Armaments

You touch a creature within range, augmenting their weapons and armor with arcane power. Until the spell ends, attacks with a weapon made by that creature deal an extra 1d4 force damage on a hit. Additionally, if the affected creature is wearing armor, wielding a shield or under the affect of the Mage Armor, it gains a +1 bonus to AC and saving throws. 

At Higher Levels. If you cast this spell using a spell slot of 3rd level or higher, the duration is concentration, up to 10 minutes and the extra damage increases to 1d6. If you cast this spell using a spell slot of 4th level or higher, the bonus to AC and saving throws increases to +2. Using a spell slot of 4th level or higher grants a duration that doesn't require concentration.