The Corpse Lord.

You have made a pact with the God of Death. You are now his humble emissary to the land of the living.

Expanded Spell List

The Fiend lets you choose from an expanded list of spells when you learn a warlock spell. The following spells are added to the warlock spell list for you.

Fiend Expanded Spells

Spell Level	Spells
1st	false life, inflict wounds
2nd	darkness, gentle repose
3rd	animate dead, bestow curse
4th	faithful hound, blight
5th	raise dead, contagion

Corpse Gift

Starting at 1st level, when you make a melee attack you may add necrotic damage equal to your Charisma modifier + your warlock level (minimum of 1).

Quickened Death

Starting at 6th level, you can call on your patron to grant you a small use of their power.

Once you use this feature, you can’t use it again until you finish a short or long rest.

Undead assistant

Starting at 10th level, you can choose one type of assistant from your patron. the assistant can be summoned  in a 10-minute ritual.

Sentient shadows

Your patron has gifted you the power to control your shadow. It splits into two Shadows.

Stats on p.344 of basic rules.

Skeletal command

You have command of 2 skeletons and a warhorse skeleton. They obey your command and  Can be summoned in a 10-minute ritual.

stats on p.346 and p.152

Skull companion

Your patron has given you a flaming skull. It is under your command.  Stats on p.127 monster manual.

Zombification

Starting at 14th level, You become more like a zombie, but with benefits. you gain immunities to poison and necrotic and have a necrotic touch.