Slayer: Swarmkeeper

Original Source: Tasha's Cauldron of Everything

Gathered Swarm

As in Tasha's Cauldron of Everything with the following addition:

Additionally, you learn the mage hand cantrip, which you use by manipulating your swarm as if it were the spell. This effect is not magic, so it cannot be dispelled.

Symbiotic Swarm

Also at 3rd level, you have a symbiotic relationship with the creatures that make up your swarm. You are under the constant effects of the speak with animals spell, but can only use it to speak with animals similar to those who make up your swarm. This magical effect cannot be dispelled. If you know the spell, you can still cast it to speak with other types of beasts.

Additionally, you can't be surprised, except when incapacitated by something other than nonmagical sleep. Your swarm awakens you and your companions within 30 feet if any of you are sleeping naturally when combat begins.

Writhing Tide

You can condense part of your swarm into a focused mass that aids your mobility. As a bonus action, you gain one of the following benefits for 1 minute or until you are incapacitated:

You can use this feature a number of times equal to your proficiency bonus, and you regain all expended uses when you finish a long rest.

Mighty Swarm

As in Tasha's Cauldron of Everything

Swarming Dispersal

As in Tasha's Cauldron of Everything