At 2nd level, The swarm has unified itself with your body, making it its home, inside you is a swarm of tiny or smaller creatures. You may communicate with those creatures, with them being able to understand you fully and communicate back in kind.
You may spend 10 minutes to summon a medium sized swarm of these creatures of CR 1/2 or less. The summoned swarm has the following abilities:
- The swarm obeys your commands as best as it can. It is immune to mind-altering effects.
- You may hide the swarm inside of your body if you are fully clothed. When hidden this way, they cannot be detected except by magical means.
- In combat, the swarm moves on your initiative step. The swarm cannot perform an attack action, instead, it attacks any enemy creature that moves through its space and any creature that begins its turn in its space.
- When you Wildshape, if it is into a swarm of creatures that is the same species as the swarm, you may choose to integrate with it. If you do, the swarm disappears for the duration of the integration. You gain the Extra Attack ability and you gain Temporary Hit Points equal to the hit points of the swarm before integration. You become 1 size larger than whichever of you was larger before integration. Integration ends when you either; lose all of your temporary hit points, are rendered unconscious or willingly end it.
- The swarm cannot be healed by magical or non-magical means. It can regain hit points during a short rest (1D8 per druid level) and regains all of its hit points during a long rest.
- every time the swarm increases in size, it deals an additional 2d4/1d6 damage of its type.
- The swarm gains additional proficiency bonus to its attacks and skills which it is proficient in.
- The Swarm also adds your proficiency bonus to its AC and to its damage rolls.
- The Swarm gains proficiency in two skills of your choice.
- It also becomes proficient with all saving throws.
- For each level you gain after 2nd, your animal companion gains an additional hitpoints equal to 5 times Druid Level.