The Wish

Expanded Spell List:

1st: Detect Evil and Good, Shield.

2nd: Spiritual Weapon, Lesser Restoration.

3rd: Beacon of Hope, Conjure Barrage.

4th: Faithful Hound,  Private Sanctum.

5th: Conjure Volley, Destruction Wave.

Elemental Alignment

At 1st level, choose one of cold, fire, acid, necrotic, radiant, thunder or lightning. When you cast Eldritch Blast, you may have it deal damage of the chosen type instead of force. 

Cold

Your Elemental Alignment is Cold.

Fire

Your Elemental Alignment is Fire.

Lightning

Your Elemental Alignment is Lightning.

Necrotic

Your Elemental Alignment is Necrotic.

Radiant

Your Elemental Alignment is Radiant.

Thunder

Your Elemental Alignment is Thunder.

Guardian Transformation

Your maximum Hit Points increase by 1 for every level you have of this class. As a bonus action you can call upon your gem's power to enact a Guardian Transformation for up to an hour, and you can dismiss it at any time. While under the effects of Guardian Transformation, your Armor Class becomes 13+ your Charisma Modifier, your clothes change appeareance for the duration of the Transformation. You decide what it looks like, including color, style, and accessories. You can use this feature an amount of times equel to your proficiency bonus per long rest.

Guardian Weapon

When you gain this feature, you can choose a weapon. This is your Guardian Weapon. You gain proficiency with that weapon. When you attack with your Guardian Weapon, you can use your Charisma modifier, instead of Strength or Dexterity, for the attack and damage rolls. You can perform a 1 hour ritual with your chosen weapon to transfer the magical properties of another magical weapon to your chosen weapon, replacing any previous properties and removing them from the other weapon destroying it. Additionally, you can use your Guardian Weapon as a Arcane Focus for your Warlock spells.

Elemental Amplification

When you reach 6th level you gain additional benefits from your Elemental Alighnment. Once per turn when you hit with an attack with your Guardian Weapon you can deal an extra 1d6 damage or your Elemental Alighnment. This damage increases to 2d6 at level 10, and 3d6 at level 14. 

Elemental Fortifications

Starting at 10th level, your Guardian Transformtion and Guardian Weapon are enhaced. Your Guardian Transformation now grants you a resistance to your Elemental Affinity. Your Guardian Weapon gains one of the following effects depending on your Elemental Affinity:

Cold: Enemies hit by this Weapon or Eldritch Blast from this arcane focus have their movement speed reduced by half until your next turn. A creature can't be effected by this effect more than once per turn.

Fire: Enemies hit by this Weapon or Eldritch Blast from this arcane focus take 1d6 Fire damage at the start of their next turn.

Lightning: Enemies hit by this Weapon or Eldritch Blast from this arcane focus can't take reactions until your next turn.

Necrotic: Enemies hit by this Weapon or Eldritch Blast from this arcane focus can't be healed until your next turn.

Radiant: Enemies hit by this Weapon or Eldritch Blast from this arcane focus have disadvantage on attack rolls until your next turn.

Thunder: Enemies hit by this Weapon or Eldritch Blast from this arcane focus are Deafened until your next turn.

Spirit Gem's Purpose

Starting at 14th level, when you die, your spirit withdraws into your Gem. If your gem is destroyed while you are in it, you die. After one minute has passed, your spirit can return to your body and you will return to life at half your full Hit Points, provided your body is within one mile and remains in a humanoid form (I.E.: still possessing at least one limb and the head). Once you use this feature you can't use it again until you finish a long rest. If your body is out of range, you can remain in the gem indefinitely, and can mentally speak with someone holding your gem. If your spirit is in the Gem, you can be the target of Raise Dead, Resurrection, or True Resurrection spell without your body, at which point a whole copy of your old body, is created, destroying your old body.