The Corpse Star

Your patron is the corpse star, an entity from the farthest corners of space. These entities, oftentimes literal dying stars,  have influence spreading all across the cosmos. The corpse star views all of creation as part of a greater whole and though far away its powers manifest in warlocks in many forms. Some are chosen by accident, others need to gather power for their corrupted masters and others yet are tasked with eliminating "tumors" within the great body of the cosmos.

Examples of Corpse Stars include Hadar the dark hunger, Zhudun the star with a blank face and Amojgar the still beating heart.

Expanded Spell List

The Corpse Star 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.

Corpse Star Expanded Spells

Spell Level	Spells
1st	cure wounds, inflict wounds
2nd	alter self, wither and bloom
3rd	clairvoyance, life transference
4th	locate creature, vitriolic sphere
5th	antilife shell, insect plague

Essence Thief

Starting at 1st level you can use your own blood to rip out the blood of your victim. As an action you can make a melee spell attack against one creature within 10 feet of you. On a hit, the target takes 1d10 + your Charisma modifier necrotic damage and you gain temporary hit points equal to your proficiency bonus.

You can use this feature a number of times equal to your charisma modifier and you regain all expended uses when you finish a long rest.

Cosmic Mark

Starting at 6th level, you can sense the life flowing throw your victims and use that knowledge against them. When you make a melee spell attack against a creature that isn't an Undead or a Construct, you can use your bonus action to mark them for 24 hours. You know the location of marked creatures within 1 mile of you and whenever you hit it with another melee spell attack you can roll one of the spells damage dice one additional time and add it to the damage of the attack.

Life Detection

Starting at 10th level, you can sense all life that isn't an Undead or a Construct within 1 mile of you. You can know the general direction they're in but not their exact locations.

Additionally while you aren't blinded, you can see any creature that isn't an Undead or a Construct within 60 feet of yourself, even through total cover, heavily obscured areas, or any other non-magical phenomena that would prevent sight.

Blood Boil

Starting at 14th level, you can use the brutal magic of your patron to make your enemies blood begin to boil. As an Action you can choose a point within 150 feet of yourself, and a 20-foot radius sphere centered on that point fills with a burst of searing, blood-red mist. Each creature of your choice that you can see in that area must make a Consitution saving throw. On a failed save, a creature takes 7d10 nectoric damage and is incapacitated until the end of its next turn. On a success, a creature takes half as much damage and isn't incapacitated. A creature dies if reduced to 0 hit points by this necrotic damage.

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