The Keeper of Dead

Many fear death, but the fact is the cycle of mortal life ending and mortal souls passing on to the afterlife is the most natural thing there is.

There are many beings who see undeath as robing them of the souls that are rightfully theirs. Whether it's fiends seeking those who have used undeath to avoid payment on contracts or more benevolent beings appalled at innocent victims being denied rest by those who would use them as minions.

Regardless of the nobility of their goals, these beings need mortal hands to retrieve these wayward souls. Warlocks who make pacts with these keepers of the dead become reapers. Whether it's out of their own hatred for undeath or a desire to secure a better afterlife, they become the scythes that reap the dead who haven't yet come home.

Expanded Spell list

 

The Keeper of the Dead Patrion lets you choose from an expanded list of spells when you learn a warlock spell.

1st level: Detect Evil and Good and Protection from Evil and Good

2nd level: Gentle Repose and Magic weapon

3rd level: Speak with Death and Spirit Shroud

4th level: Death Ward and Aura of Purity

5th level: Dispel Evil and Good and Hallow

Reaper of the Dead

Starting at level 1, each undead creature slain by you or any creature summoned by you grants a number of Reaped Souls equal to half it's challenge rating. You can have a maximum of reaped souls equal to your warlock level + your charisma modifier 

As a bonus action, a single reaped soul can be traded for one of the following bonuses

• Gain temporary hit points rolled from one of your warlock hit-dice.
• Gain advantage or nullify disadvantage on wisdom rolls until your next turn.
• Pass a death save without the need to roll (This can be done while incapacitated)

At the dawn of each day your number of Reaped souls is set to one. Any unspent Reaped souls are bought by your patron for 1 gold piece per soul.

On a Pale Horse

Starting at 6th level, you can summon a mount that takes the form of a ghostly, skeletal, or white horse, chosen by you. In combat the horse has the same statistics as a Warhorse.

You share a telepathic bond with the horse and it obeys your spoken or telepathic commands. While you are riding the Horse, it gains the effects of the Waterwalking and Spiderclimb spells.

If you are separated from the mount or it is slain, you can resummon it. You may only summon it once per long rest.

Grim Harvest

Starting at 10th level, you may use your bonus action to spend multiple reaped souls. If spending multiple reaped souls for an effect that costs one reaped soul, the effect is granted to the number of creatures equal to reaped souls spent.

In addition, you can spend multiple reaped souls to gain the following effects

• Any number of creatures you choose that kill undead grant you reaped souls. Costs two reaped souls for a single creature, and an additional reaped soul per each additional creature granted the effect.
• You can grant a weapon your wield +1 to all attack and damage rolls until your next turn. Costs 2 souls.

Tireless Harvester

Starting at 14th level, you can take action while at 0 HP.

While in this state the only actions you can take are moving towards undead creatures, attacking undead creatures, or spending reaped souls to succeed a death save. You must still roll your death saves as normal. After three successful saves you lose consciousness.