Crackling Armor

You target a willing creature within range. It becomes sheathed in crackling energy until the start of your next turn, increasing its AC by 2 for the duration; if it is wearing metal armor, instead deal 1d8 damage to the first creature who makes a melee attack against the target, and then this spell ends.

Make a spell attack against an creature within 5 feet of the target. On a hit, electricity crackles against the enemy, dealing 1d8 lightning damage.

At higher level: At 5th level, increase both damage rolls by 1d8 damage. Both damage rolls increase by 1d8 at 11th (3d8) level and 17th level (4d8).