The Warden

Warlock pact for collecting beast, aberrations, giants, fey, fiends, elementals or even demons to use as forms of labor, weapons, shields or furniture. Binding chains, planar cells and dimensions of torture all from a eldritch prison warden: collector of those with broken pacts, perhaps an old god that keep balance over souls that need breaking, an extra dimensional torturer etc.

Prisoner's Insight

1st-level Warden Feature

Gain proficiency with Medium armor, tool, or weapon and 1 additional skill

Manacles of the soul

1st-level Warden feature

You can magically summon a spectral chain to bind a target

When you create the chain you can make a melee spell attack against one creature within 15 feet of you. On a hit, the target takes 1d10 lightning damage, and its speed is reduced by 15 feet until the start of your next turn. When you reach 8th level in this class, the damage increases to 2d10

As a bonus action on your turn, you can repeat the attack. You can summon the chain a number of times equal to your proficiency bonus, and you regain all expended uses when you finish long rest

Planar Cage

1st-level Warden feature

You gain a trinket or item that holds a pocket dimension housing a cage from your patron. When you bind a creature with your chain (grapple check with your charisma as the modifier) you can use up charges of your chain or expend a pact spell slot to cast a special "dominate" spell, the creature must succeed a charisma saving throw against your DC. The target automatically succeeds if it has more than half its maximum hit points, has a CR equal/more than your warlock level.

If the target passes the DC twice they are immune to the spell for 24 hours. 

You can only hold as many creatures within your trinket as 2 times your Charisma modifier, 3 times at level 8, 4 times at level 14 and 6 times at level 20

Cage release

1st-level Warden Feature

As an action you can summon one of your bound creatures from your planar cage back into the material world, and return them with another action. The creatures levels as you do gaining more hp as you level up. If creature's hp reaches 0 it will become incompacitated, after 2 failed death saves its soul is shattered and no longer bound to any world. 

Death row soul

6th-level Warden feature

You gain resistance to lightning damage. In addition, when you are hit with a spell that does lightning or thunder damage you have advantage on the save.

Riot Gear

6th-level Warden feature

Your bound creature (inmate) can defend you and others, interposing itself between them and harm. When you or a creature you can see takes damage while within 5 feet of the Inmate, you can use your reaction to choose one of those creatures and reduce the damage to that creature by 1d10. When you reach 10th level in this class, the damage reduced by the bound creature (inmate) increases to 2d10.

Loose bars

10th-level Warden feature

As a bonus action you can summon a partial Rift allowing a body part, limb, organ, or head of an inmate that you own anywhere within 30 feet of you and use one of its actions. You can do this a number of times equaled to half your proficiency bonus per short rest

Jail Break

14th-level Warden feature

You can now summon up to 3 inmates from their cages at once, they gain temporary hit points equal to your spell casting modifier and you can choose the destination of their rifts from 60 feet from you. They roll their own initiative but are linked to you telepathically. 

More over they gain resistance to lightning and immunity to the charm affects from anyone that isnt you, if they do not already have it.

Open Cell Block

14th-Level Warden feature 

Gain a new call block to house 4 high CR Creatures. These CR ratings can be up to your Current level as long as the creature was as close to death as possible before dominated. 

Execution day

14th-level Warden Feature

At 14th level you can end the life of one of your inmates to give its life for an ally. Roll the creature's hit die to exchange its life