The Luna wolf

Horus called forward the power of his ancestor and created a mystic veil surrounding his body. Horus gets a +2 AC and creates a 2d6 slashing damage and 1d4 lightning damage moon blade that acts as a straight sword but uses an Intelligence modifier. 

At 5th level, you can use a spell slot to add additional 1d6 lightning damage per spell slot.

At 9th level, the spell gives you +3 AC and affects all your allies.