The Beholder

This subclass is specific to the Beholder Heimlich, a white Beholder, ruler of the Frozen Caps and commander of wild beasts. Heimlich has slowly built an empire of beasts he uses as scouts by first dominating them and then replacing one of their eyes with his. His domain stretches throughout the Frozen Caps but nowhere in the humanoid realm. Seeking to expand his empire, Heimlich seeks those of the humanoid race to take on his eyes so that he can see into all the humanoid societies that clutter Gergania. Should you be one such creature that Heimlich deems worthy of such cause, Heimlich will grant you one of his eyes (of your choice with a high enough persuasion check) lending you some of his powers in return for infiltration into the humanoid realms which unlocks this subclass of warlock for your character.

Heimlich's Blessing

Starting at level 1, when you use your beholder eye, role a d6. On a 6, you regain one use of the eye. Like your spells, your eye recharges after a short rest should you have zero charges. 

Nowhere to Hide

Starting at 6th level, you can spend 10 minutes conducting a ritual to summon a gazer once per long rest. This gazer is friendly to you and your allies and follows your directions. You are able to see through the Gazer's eyes as well as your own eyes at the same time. This gazer can be treated like a familiar and can be dismissed at anytime. Your eye also recharges on a 5 or 6. 

Natural Paranoia

Starting at level 10, your passive perception is 15 if it isn't already and you get advantage as well as an additional +5 bonus for any perception check using your sight (This ability also applies to your Gazer). You also gain Darkvision up to 120 ft, can't be surprised and your eye recharges on a 4, 5, or 6.

Conqueror's Eye

Starting at 14th level, you can spend a bonus action to change the type of beholder ray you shoot. This can be done a number of times equal to your intelligence modifier + 1 per long rest. Your eye now recharges on numbers 2-6.