Eye of the Swarm

From now on, you are made of the Swarm. You gain the damage reduction of a swarm and immunity to attacks of opportunity. Your Strength and Dexterity ability scores increase by (4 plus your swarm size). You gain immunity to most effects affecting a normal mortal body, such as poison, disease, paralysis, and stun. Additionally, while Swarm Form is active, all your attacks deal an additional (4 plus your swarm size) damage and any opponent that attacks you in melee combat takes (4 plus your swarm size) d6 damage.