The Psion

You have made a pact with a being of psionic power, such as an aboleth or an illithid. 

Telepathic Link

Once per day, you can use your bonus action to establish a telepathic link with a creature. The creature is not aware of of the link until you send them a message with it. They are not aware who is sending the message unless you explicitly tell them who it is. They cannot end the link unless they can also communicate telepathically.

As a bonus action, you can dismiss the link. You gain an additional use of this feature at 6th level, 10th level, and 14th level.

Black Cloud

At 6th level, you can use you mind to summon a dark cloud of force. The cloud affects up to three creatures you can see, provided they are within 120 ft. of each other. The cloud lasts 1 minute, or until it is dispelled by a spell such as dispel magic. Any creature that begins its turn in the cloud takes 1d8 necrotic damage and cannot see more than 5 ft. ahead. The cloud extends for 50 ft. away from each creature at the edges.

Once you use this feature, you cannot use it again until you finish a long rest.

Eldritch Talent

At 10th level, your eldritch blast is enhanced. The range increases by 120 ft., and you can add your wisdom modifier to the damage.

Solitary Confinement

At 14th level, you can draw upon a creatures worst fears to make it experience visions of loneliness. The creature finds itself trapped in a small room, just big enough for it to stand up in, with no windows, doors, or visible exits. The creature can hear murmurs, but cannot see any voices. The DM decides if this has any effect on the creature.

If anybody looks at the creature, it merely appears to be stiff and frozen in place.

Once you use this feature, you cannot use it again until you finish a long rest.