Muzan Kibutsuji

The Progenitor of all things that are evil. The Demon Monarch. Nosferatu. Muzan Kibutsuji goes by many nicknames, however, isn't wholly considered a celestial being. More of a human which had broken the bounds of limit, obtaining power far stronger than mortals could. Muzan Kibutsuji will often give the character tasks, that when completed, reward you with either XP or +5 health. Bargain with this entity if you wish to obtain true power, destruction and wrath in exchange for your mortality and your servitude. 

Demonic Prowess

Muzan Kibutsuji grants you increased strength as a demon

 

Muzan Kibutsuji's Blessing

Starting at 1st level, when you reduce a hostile creature to 0 hit points, you gain temporary hit points equal to your Charisma modifier + your warlock level (minimum of 1).

Muzan Kibutsuji's Own Luck

Starting at 6th level, you can call on your patron to alter fate in your favor. When you make an ability check or a saving throw, you can use this feature to add a d10 to your roll. You can do so after seeing the initial roll but before any of the roll’s effects occur.

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

Fiendish Resilience

Starting at 10th level, you can choose one damage type when you finish a short or long rest. You gain resistance to that damage type until you choose a different one with this feature. Damage from magical weapons or silver weapons ignores this resistance.

Hurl Through Hell

Starting at 14th level, when you hit a creature with an attack, you can use this feature to instantly transport the target through the lower planes. The creature disappears and hurtles through a nightmare landscape.

At the end of your next turn, the target returns to the space it previously occupied, or the nearest unoccupied space. If the target is not a fiend, it takes 10d10 psychic damage as it reels from its horrific experience.

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