The Renegade

Visions come to you while you dream. Unjust and unfair rulers, egregious abuse of power. Corruption, murder, slavery. Consequences for these crimes must be wrought. Briefly mentioned in only the oldest of text, referring to one who fell from grace. Your patron was cast down for its own brutality, banished to a world opposite of yours where it even now resides. 
Those seeking retribution for injustice and the downfall of true evil can be brought before the renegade, shown visions of the world it rules over. Granted but a drop of its vast power. Fueled by a similar rage.
Everywhere you go. The sensation of eyes, watching your each and every move. An overwhelming pressure weighing down on you. You are drawn to those who deserve you fury, your vengeance.
(5thEditionHomebrewing on tumblr is where I got this from. Not my idea)

Expanded Spell List

Renegade Expanded Spells

SPELL LEVEL	SPELLS
1st	bane, compelled duel
2nd	detect thoughts, dragon's breath
3rd	lightning bolt, blinding smite
4th	dominate beast, greater invisibility
5th	destructive wave, immolation

Distorted Forme

You gain a +2 bonus to your AC.

When entering this forme, you gain temporary hit points
equal to your Charisma Modifier x Half your proficiency
bonus (rounded up) + your warlock level.
If you score a critical hit against a creature, they become
marked by the hex spell. This effect lasts for 1 minute and
does not require concentration. If you score a critical hit
against another creature, you may choose which receives
the hex.

You remain in this forme for 1 hour. It ends early if you are
knocked unconscious. You can also revert to your normal
forme on your turn as a bonus action.

Shadow Step

When you are in dim light or darkness,
as a bonus action you can teleport up to 60 feet to an
unoccupied space you can see that is also in dim light or
darkness. You then have advantage on the first melee attack
you make before the end of the turn.
Additionally, you can see through magical darkness and
gain darkvision out to a range of 30 feet if you do not already
have it. If you do have it, the range increases by 30 feet.

Pressure

Starting at 10th level, if a creature you can see casts a spell
(whether it is successful or not), you can use your reaction
and cause them to expend 1 additional spell slot of the same
level they used to cast the triggering spell. If they do not have
another unused spell slot of that level, expend one of next
available level below it. Once you use this ability you must
complete a short or long rest before you can use it again.

Shadow Force

Starting at 14th level, you can choose a creature you can see
within 120 feet. Then, you vanish, transported to a world
unlike the one you know. Dark, with platforms floating at
every conceivable angle. Trees grow from nothing and then
disappear, waterfalls flowing up towards the sky. This world
disobeys the normal laws of physics. A palpable hatred, a
malice fills the air here. But it doesn't concern you. It feels
right, you feel like this is somewhere you are meant to be.
You remain in this world until the start of your next turn. At
which point you appear in an unoccupied space adjacent to
the target you chose when activating this ability. The target
takes 8d8 + your warlock level force damage. This attack
ignores any effect, magical or otherwise, that would prevent
its damage or reduce it in any way. This attack cannot miss
unless the target moves more than 400 feet away from where
they stood when targeted by this ability. This attack also fails
if they move to a different plane. Once you've used this ability
you must complete a long rest before you can use it again. If
the damage from this attack brings a creature to 0 hit points,
you regain use of this ability.