You are haunted or guided - who is to say - by some alien creature who plants voices and images into your consciousness. The impressions never cease and cannot be heard or seen by anyone else unless you allow them to speak through you. 

Alien Aid. The unknown source of the alien voices and images wants to protect you - if you let it. You intentionally let some of the alien influence get deeper inside of you, taking it in and drawing on its power. When you fail a saving throw, you can expend one of your Hit Dice to roll it and add that number to your saving throw. If you use this on a Death Saving Throw, you succeed and regain 1 hit point regardless of what is rolled on the d20. Once you succeed on a save with this ability, it can’t be used again until you finish a long rest. 

Sudden Outburst. When hit by an attack roll, use your reaction to let the alien visions from your mind burst out into the world. For a brief second the attacker is flooded by sounds, pictures and other impressions from the Far Realm. Add your proficiency bonus to your AC potentially causing the attack to miss. Once this ability causes an attack to miss, you can’t use it again until you finish a long rest.

Images from Far Beyond. After rolling a 1 on an attack roll, saving throw, or ability check, the images get too overwhelming. Roll on the Images (1d4) table to determine what happens. This can only happen once per short or long rest.

1. Disadvantage on your next attack roll, ability check, or saving throw.
2. You are blinded for 1 minute as the images overwhelm you.
3. Become frightened of the creature closest to you until the end of your next turn. If there are multiple creatures equally close to you, the DM chooses which one you’re frightened of.
4. Within the next 10 minutes, you can ask about the results of a specific course of action that you expect to take within the next 30 minutes. You receive a visual omen as if with the Augury spell.