Otherwordly Patron Primordial.

"Demi-gods. Ever heard of such great beings? Well, I serve one. And she isn't that happy with your aggression towards her domain."
-Warlock serving Primordial.

 

As a primordial warlock, your goals would include ascension to demi-godhood, or further, reaching the home plane of your primordial patron and serving them, or maybe surpassing them.

As a servant of elemental primordials, your focus lies in powerful elemental spells, controlling elements and summoning elementals.

Expanded Spell List

 Level 1: Chaos Bolt, Detect Magic
Level 2: Shatter, Dust Devil
Level 3: Elemental Weapon, Lighting Bolt
Level 4: Control Water, Wall Of Fire
Level 5: Conjure Elemental, Cone of Cold

Blessing of Primordials

Starting at level 1 when you choose this patron, You learn to write, read and speak Primordial.
Additionally, when speaking in primordial your patrons voice echoes behind your own voice. You have advantage on charisma checks against creatures that can understand primordial.

Elemental Control

at 6th level, you one choose element, gaining resistance to element of your choise and being allowed to re-roll up to two damage dies of that element type when casting spells.
Choose from; Fire, Cold, Lighting, Thunder.

Starting al level 9, you can apply your spellcasting modifier to spells that deal your chosen elements damage.

Absorption

at 10th level, your character becomes capable of absropting his chosen element. When you take damage from your Elemental Controls chosen element, you can spend your reaction to absorpt portion of that damage. You nullify highest damage roll completely. Next time you use a spell of your chosen element in any way, you can add that die into the spells effect.

You can store only 1 die at a time, and you cannot replace already stored die with another.

Primordial beckoning

At 14th level, You hear the call of your primordial patron in your ears. You become immune to Charmed condition.

Additionally, as a action, you have ability to cause elemental distruption with diameter of 200 feet circle centered on your initial location upon using this feature, causing all elemental effects of your chosen Elemental Control type in the area be controlled by you for next 30 seconds (5 turns).
 You can also spend your action each turn in order to control your elements natural hazards, such as moving open fire in up to 15 feet wide area by 15 feet towards your chosen direction every turn.

 As an example, your choise of element is fire, and enemy tries to hurl fireball at you. Instead, the fireball is centered in space of your choise, as long as it remains inside the range of distruption effect.
 As an example, your choise of element is fire, your party is in raging inferno of a building. You drop down your distruption zone and push back the flames slowly creeping at you every turn, as you slowly form path to safety.

You must finish a long rest to use this feature again.