Swarm Patron

You have made a pact with a powerful and sentient being who appears as a swarm of tiny creatures. Your patron has gifted you some of the defenses of swarms in exchange for your service. You are set upon the world to grow and spread the influence of this roiling sentient mass. It speaks to you through the clicks of chitinous legs, the squeaks of hidden vermin, and susurration of wings flapping unseen in the treetops. An extension of your patron’s will, you are made of multitudes and pass through the barriers of adventuring on countless skittering legs.

Expanded Spell List

Your connection to swarms and your patron lets you choose from an expanded list of spells when you learn a warlock spell. The following spells are added to the warlock spell list for you.

Spell Level	Spells
1st	Feather Fall, Jump
2nd	Conjure Vermin, Poisonous Flesh
3rd	Cloak of Vermin, Plague Walk
4th	Aura of Filth, Giant Insect
5th	Contagion, Insect Plague

   

Gather the Swarm

At 1st level, your patron grants you some of the defenses of a swarm. You can use a bonus action to transform into a swarm-like version of yourself. You still wear and can use your equipment, but your body appears to be a mass of writhing insects, vermin, or similar Tiny creatures of the kind that comprise your patron. This effect lasts for 1 minute, until you dismiss it as a bonus action, or until you are incapacitated. If this effect ends while you occupy the space of another creature, you are pushed harmlessly to an unoccupied space within 5 feet of the creature. While in your swarm form, you gain the following benefits:

Creeping Swarm. You can occupy another creature’s space and vice versa.

Flowing Swarm. You can move through any opening large enough for a Tiny creature of the kind comprising your patron. Any equipment you are wearing or carrying that is too large for the opening doesn’t move through the opening with you.

Hungry Swarm. If you are occupying another creature’s space at the start of your turn, you can use a bonus action to force it to make a Dexterity saving throw against your spell save DC. On a failure, the creature takes 1d4 piercing damage or poison damage (your choice). This damage increases by 1d4 when you reach 5th (2d4), 11th (3d4), and 17th level (4d4).

Once you use this feature, you can’t use it again until you finish a short or long rest.
 

Indomitable Swarm

Starting at 6th level, you have advantage on ability checks and saving throws made against being grappled, restrained, and stunned, and while in your swarm form, you have immunity to these conditions. In addition, creatures in your space while you are in your swarm form have disadvantage on Constitution saving throws made to maintain concentration on a spell.
 

Feed the Swarm

Starting at 10th level, when you deal piercing or poison damage to a creature with the Hungry Swarm aspect of your swarm form, you regain hit points equal to the damage dealt. This feature can restore you to no more than half your hit point maximum.
 

Overwhelm

At 14th level, when you take on your swarm form, you can choose to become a condensed swarm of hundreds more Tiny creatures, or you can choose to become a Large swarm, occupying the space a Large creature would occupy. While in a condensed swarm form, you have resistance to bludgeoning, piercing, and slashing damage. While in a Large swarm form, you can choose to target any number of creatures in your space with your Hungry Swarm, and each target must make the saving throw, taking damage on a failure, as normal.