Swarm of Crabs

You summon a large swarm of angry crabs, they are friendly to you and will attack enemies if ordered.

- You put the crabs on your body, and use them as armor. Your AC increases by 15 + your dexterity modifier. The effect ends when the crabs lose all of their health.

- You can order the crabs to attack a target within range of sight. Enemies must roll a constitution saving throw. The crabs do 2d8 piercing damage on a failed save, or half as much damage on a successful one. A creature must also make this saving throw when it enters the spell's area for the first time on a turn or ends its turn there. The spell ends when the crabs lose all of their health.

Your swarm of crabs has 50 hit points (5x10 or 5 health for 10 crabs).