You can curse the soul of a person you slay, temporarily binding it in your service. When you slay a humanoid, you can cause its spirit to rise from its corpse as a specter. When the specter appears, it gains temporary hit points equal to half your warlock level. Roll initiative for the specter, which has its own turns. It obeys your verbal commands, and it gains a special bonus to its attack rolls equal to your Charisma modifier (minimum of +0).
The specter remains in your service until the end of your next long rest, at which point it vanishes to the afterlife.
Once you bind a specter with this feature, you can't use the feature again until you finish a long rest.
You can cast detect magic at will, without expending a spell slot or material components.
You can cast polymorph once using a warlock spell slot. You can't do so again until you finish a long rest.
You can cast disguise self at will, without expending a spell slot.
As a bonus action, you cause a psychic disturbance around the target cursed by your hex spell or by a warlock feature of yours, such as Hexblade's Curse and Sign of Ill Omen. When you do so, you deal psychic damage to the cursed target and each creature of your choice within 5 feet of it. The psychic damage equals your Charisma modifier (minimum of 1 damage). To use this invocation, you must be able to see the cursed target, and it must be within 30 feet of you.
You gain the ability to place a baleful curse on someone. As a bonus action, choose one creature you can see within 30 feet of you. The target is cursed for 1 minute. The curse ends early if the target dies, you die, or you are incapacitated. Until the curse ends, you gain the following benefits:
-You gain a bonus to damage rolls against the cursed target. The bonus equals your proficiency bonus.
-Any attack roll you make against the cursed target is a critical hit on a roll of 19 or 20 on the d20.
-If the cursed target dies, you regain hit points equal to your warlock level + your Charisma modifier (minimum of 1 hit point).
You can’t use this feature again until you finish a short or long rest.