Otherworldly Patron: Essence of the Universe

Your patron isn't so much a immortal god or a being of immense power, rather the cognizant fabric of reality. Since the dawn of time, there has always been a unseen guiding hand leading the universe towards balance and harmony. Very few warlocks have attained the knowledge and patronage of the universe, as it comes with the burden to protect and preserve the balance. However, those chosen by this collective consciousness have the power to shape and guard the balance of good and evil. How does the Universe reach out to us? Is it a gently leading hand or a harsh and bitter bite? For some select few the universe touches and grants extraordinary powers, however those who seek to destroy and reek havoc on the multiverse beware. 

The Universe grants you an expanded spell list.

Expanded Spell List:

1st Level: Identify, Protection from Evil and Good

2nd Level: Maximillian's Earthen Grasp, Spiritual Weapon

3rd Level: Blink,  Magic Circle

4th Level: Sickening Radiance, Fabricate

5th Level: Creation, Dispel Evil and Good

Additional Pact Boons to Consider:

Pact of Hidden Knowledge (Pact of the Tome) 

At 3rd level, a character can select this option instead of one of the warlocks existing Pact Boon options. The Universe grants you a tome bound in shimmering crystal. While the Tome is on your person you know the Detect Thoughts spell and can cast it without expending a spell slot and it doesn't count against your spells known. Furthermore you may channel the vast knowledge and understand of reality, for 5 minutes you gain advantage on Wisdom and Intelligence checks. You also can read any writing and understand any language as well as speak it. Once you have used this ability, you lose all aforementioned benefits and cannot use this ability again until you finish a short or long rest.

Pact of the Void's Shroud (Pact of the Blade)

At 3rd level, a character can select this option instead of one of the warlocks existing Pact Boon options. In addition to gaining a Pact weapon, your patron bestows upon you a magical garment infused with the darkest energies of the expanse. While this garment is on your person, you know the Darkness spell and can cast it with out expending a spell slot and it doesn't count toward your spells known. Also, as a bonus action you may channel the energy from this garment into your Pact weapon. Upon doing so your weapon has the added benefits of the spell Shadow Blade. This effect lasts until dispelled or until you dismiss your Pact weapon. Once, this feature has been used you may not use it again until you finish a short or long rest.

Pact of Ursa Major's Blessing (Pact of the Chain)

At 3rd level, a character can select this option instead of one of the warlocks existing Pact Boon options. You have gained the favor of one of the most ancient celestial bodies. In return for your loyalty to the balance of the universe, the stars themselves grant you extraordinary power. Your familiar now can grow stronger the more powerful you become. Once you have gained this boon look at the any creature of challenge rating 3 you can spend 1 hour to transform while expending the necessary cost to change your familiar into it. Once you have transformed your familiar into said new creature it cannot change into anything of challenge rating 3 other than your chosen creature. However, you may change it to its previous forms as are allowed by the Find Familiar spell and this boon. Finally at levels 10, 15, and 20 you may repeat this process to upgrade your familiar by 1 challenge rating. Challenge rating of 4 at level 10, 5 at 15, 6 at level 20.

Guided by Unseen Ways

Starting at 1st level, as a bonus action you can gain advantage on weapon attacks and spell attacks until the end of your next turn. Additionally, any attack that hits an enemy or enemies deals an additional 1d6 force damage. This damage increases to 1d8 at 6th level and 1d10 at 10th.  Once you use this feature you may not use it again until you have completed a short or long rest.

Attuned to the Universe

At 6th level, you may choose a damage type and gain resistance to said damage. Furthermore when hit by the damage you are resistant too, you can use your reaction to attempt to nullify the damage completely. The DC to nullify the damage starts at 10 and increases by 5 every subsequent use. The DC resets back to 10 after you finish a long rest.

Gift from the Expanse

Starting at 10th level, your patron grants you access to your own demiplane to be shaped by your imagination. The dimensions for the empty space are 20 by 20 sq. ft.. This space can be made into the shape of a personal room or study, etc. Only you have access to this space and may enter it, if another creature or person attempts to enter you both are shunted out of the space immediately. You may spend 10 minutes to open a portal which appears as a  locked door for you to enter. The door is treated as having the Arcane Lock spell placed on it. The portal remains until you leave the space. Anything placed inside the Demiplane remains until taken out. However, you can spend a minute to open a portal large enough to retrieve an item from said space without entering.

One with the Universe

Starting at 14th level, you cease aging and cannot be magically aged by any means. Furthermore, you no longer need to sleep, eat or breath. In order to gain the benefits of a short or long rest you may spend the time meditating and feeling out into the multiverse. During this time, you may ask up to 3 questions of your patron. The DM may interpret the question and their answers. There is a 25% chance that you won't get an answer for your question.