Swarm Gauntlet

Swarm Gauntlet
Wondrous item, uncommon (requires attunement unless you are attuned to the Aquatic Symbiote)

This living gauntlet is host to a swarm of coelamorphs. The swarm uses the stat block provided. As an action while wearing the gauntlet, you can release the swarm into the space you occupy. The swarm is friendly to you and your companions, and it obeys your commands while you are within 60 feet of it.

In combat, the swarm shares your initiative count, but it takes its turn immediately after yours. It can move and use its reaction on its own, but the only action it takes on its turn is the Dodge action, unless you take a bonus action on your turn to command it to take another action. That action can be one in its stat block or some other action. If you are incapacitated, the swarm can take any action of its choice, not just Dodge.

As a bonus action while you are within 5 feet of the swarm, you can call it back into the gauntlet. While inside the gauntlet the swarm has total cover. When you complete a short rest while the swarm is inside the gauntlet, you can choose to spend hit dice to heal the swarm instead of yourself. The swarm regains hit points equal to the number rolled on the hit die plus your Constitution modifier. When you complete a long rest while the swarm is inside the gauntlet, it regains all lost hit points. If the swarm is destroyed, a new swarm develops within the gauntlet in 1d4 days.

Uruvel waited in a dark recess of the crevasse as the divers swam past. The many calcified pods lining his skin stirred with excitement. His small ones could sense that a bloody feast was soon upon them. As the divers reached a small patch of glittering gold coins, carefully arranged by Uruvel to catch the light from above, he emerged from the darkness. Each of the pods opened to reveal a tiny coelamorph living within, and they simultaneously burst into action. The divers were instantaneously swarmed with tiny serrated jaws, without a moment to even scream. All that was left was a murky red cloud of bones and sinew that drifted down to join the ever-growing pile on the seafloor. The small ones, full and contented, returned to their homes within Uruvel’s body, as he hummed and thoughtfully adjusted the coins again to catch the choicest angle of light.