The Fractured Mirror

Warlocks who look out into reality sometimes find patrons through the looking glass. Often these creatures are from other dimensions and worlds, only visible or intelligible through portals, windows, and silver-backed mirrors. These entities can range from a sundered reflection of the warlock in a mirror dimension, a shattered force that is little more than a multiversal glitch, or something from the Far Realm that can speak through reflective surfaces. Whatever the case, the Fractured Mirror is unmistakably like the warlock in many ways, but only brings to light specific tendencies. Every action has an equal and opposite reaction, and the Fractured Mirror is an encounter with your equal and opposite.

Reflective Rage

You can reflect the malice of those who wish to do you harm. As a reaction, when you take any sort of damage. You can deal 1d8 damage of the damage type dealt to you. If more than one damage type was dealt to you, you deal damage of the amount that did more damage. You can do this a number of times equal to your proficiency bonus, and you regain all expended uses on a long rest.
This damage increases to 2d8 at level 6, 3d8 at level 10, and 4d8 at level 14.

Expanded Spell List

The Fractured Mirror 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.

• 1st disguise self, fog cloud
• 2nd silence, phantasmal force
• 3rd blinding smite, spirit guardians
• 4th compulsion, phantasmal killer
• 5th seeming, synaptic static

Armor of Shards

As a bonus action, you create a glinting magical armor of mirror shards. While this armor is in place, you have 1d10 temporary hit points. You can do this number of times equal to your proficiency bonus, and you regain all expended uses on a long rest.
In addition to this, your patron has honed your focus on the reflective aspects of the plane around you. You can see through any reflective surfaces within a 30-foot radius, provided that you know they are there. You are not considered blinded when you do this.

Splintered Defenses

You gain a sliver of defensive power from the other realm your patron calls home. When your temporary HP from Armor of Shards is reduced to 0, a number of creatures up to or equal to your Charisma modifier within 60 feet of you must make a Dexterity saving throw. On a failed save, they take 3d6 force damage as the armor fractures into shards and assaults your attackers. On a success, they take half the damage.

Reflective Soul

Your patron has brought you to full connection with this other realm, making your very essence reflective and imperceivable.
•When you use Reflective Rage, you can deal the damage rolled to another creature within 15 feet of the attacker.
•Your Armor of Shards can now give 1d10 + your Charisma modifier temporary hit points, and Splintered Defenses now deals 5d6 force damage.