Andromeda, Prophet of Death

 Bloodhail. If Andromeda fails a saving throw, she can choose to succeed it instead, at the cost of sacrificing an allied creature of CR7 or higher.

Prophet. Andromeda shares her life force with Thanatos, the god of death. This causes her to be immortal. The only ways to kill her are listed as follows:

Cause her to break her sacred vow.

Attack her with a weapon which could sever the connection between her and Thanatos, or could kill/injure a god.

Fatally injure her with divine magic.

She Who Reaps. Creatures slain by Andromeda cannot be revived by any means lesser than a wish spell.

Death's Gentle Carress. Allies of Andromeda, when downed in combat, will instantly succeed 1 death saving throw and get advantage on all other death saves.

Prophetic Domain: Death. When Andromeda attacks, if she rolls a 19 or 20, she forces the recipient to roll a Constitution saving throw. If they fail, their remaining HP will be set to 0.

Prophetic Blessing: Smite. Andromeda has 7 Smite slots. These can be expended on an attack to deal an additional 5d10 of any damage type. Her smite slots refresh after each battle.

That Which Eats is Eaten (Recharges after a Short or Long Rest). If Andromeda would be reduced to 0 hit points, her current hit point total instead resets to 300 hit points and she regains any expended uses of Legendary Resistance. Additionally, she can now use the options in the "Mythic Actions" section for 1 hour.

Prophetic Blessing: Divine Spellcasting. Andromeda can cast certain spells for free, not consuming a spell slot, only a Bonus Action. 1st-3rd level spells can be used 6 times before running out, and 4th-7th level spells can be used 4 times before running out. 8th and 9th level spells can be used twice before running out.

Spell Save DC26, +18 to hit

Divine Spellcasting Spell List.

1st Level: Fog Cloud, Ray of Sickness, Chromatic Orb, Cure Wounds.

2nd Level: Hold Person, Blur, Cloud of Daggers, Ray of Enfeeblement, Silence

3rd Level: Counterspell, Dispel Magic, Fly, Hunger of Hadar

4th Level: Spirit Of Death, Wall of Fire, Sickening Radiance, Otiluke's Resilient Sphere

5th Level: Antilife Shell, Wall of Force, Hold Monster, Hallow

6th Level: Eyebite, Globe of Invulnerability, Heroes' Feast, Soul Cage

7th Level: Finger of Death, Forcecage, Power Word: Pain, Teleport

8th Level: Dark Star, Power Word: Stun, Maddening Darkness

9th Level: Power Word: Heal, Invulnerability 

Multiattack. Andromeda can attack three times per turn with any of her three attacks.

Touch of Death. Melee Unarmed Attack. +18 to hit, reach 3 ft., 1 target. Hit: 68 (11d10+10) necrotic damage. 

Damning Blade. Melee Weapon Attack: +18 to hit, reach 6 ft., 1 target. Hit: 50 (9d8 + 10) slashing damage. The target begins to rot, taking 12 (5d4) necrotic damage every turn. They must roll a CON save to stop this effect each turn.

The Reaper Beckons. Melee Weapon Attack:+18 to hit, reach 8ft, 1 target, Hit: 37 (6d8+10) piercing damage. Targets hit by this attack must roll a DEX save. Upon failure, they are launched backwards 10ft.

Thorns on the Ever-Wilting Bloom. Andromeda can use her reaction to deal 7 (3d4) piercing damage to an attacking creature for every 10 damage dealt, and heal herself for an equal amount.

Andromeda gets 5 Legendary actions, which she can use at the end of her own or another creature's turn.

Blade of Woe. Andromeda uses Damning Blade against a creature within her attack range.

Godspeed Strike. (Costs 2 Actions). Andromeda moves up to 10ft, which is deducted from her next turn's movement speed, in any direction and uses The Reaper Beckons against a creature.

Deathsculptor. (Costs 2 Actions). Andromeda moves up to 20ft, which is deducted from her next turn's movement speed, in any direction towards a downed or dead creature. She can either revive the creature to half health or drain it of its remaining life, killing it instantly and gaining 4 (2d4) hit points back.

If Andromeda's That Which Eats is Eaten trait has activated in the last hour, she can use the options below as legendary actions.

Fear the Reaper (Costs 3 Actions). Andromeda selects up to 2 creatures and forces them to roll a WIS save. Upon failure, they become Paralyzed with the fear of death for 2 turns.

The Will of Thanatos. (Costs 5 Actions). Andromeda channels Thanatos, choosing a single creature and forcing them to roll a CON save. Upon a failure, the creature is either killed or, if they are a player character, put into death saves.