Sandy Petersen's Cthulhu Mythos for 5e
5e
Undead, Undead Creature, True Undead: The King [in Yellow]’s footstep brings the dead to life. They can return as a wide variety of undead, from simple zombies or ghosts to more powerful creatures such as vampires.
At the start of each round, all dead bodies within the area of the influence arise as undead creatures of the King in Yellow’s choice. The sum of the challenge ratings of all undead created this way at once can’t exceed the King in Yellow’s CR (22 for the example King in Yellow), and the king can’t create an undead with challenge rating higher than 2 + half his challenge rating (13 for the example King in Yellow).
Favored One of Nyarlathotep, Mindless Wraith: The ultimate fate of Nyarlathotep’s favored worshipers is to become a mindless wraith. This is gradual and disturbing degeneration into what might seem a bleak state to some, but it is a means to attain true agelessness. All it costs is the worshiper’s body and mind.
Mythos Undead: Each Mythos undead creature is a unique manifestation of undeath, defined primarily by its abilities and nature when it lived.
In rare cases, when certain alchemical techniques are applied to an exceptionally fresh corpse (or even to whole parts of fresh corpses) who, in life, possessed a singularly powerful and focused mind, the result is in an undead creature that retains its intellect; in such a case, create the creature as a Mythos undead.
Any creature other than a construct or undead can become a Mythos undead.
If you are evil before drinking this compound [Gorgondy potion], your soul will be destroyed upon death and your corpse will arise as a Mythos undead.
Whenever a creature ends its turn linked to a Quantum Nucleus, it must succeed on a DC 18 Constitution saving throw or be physically transformed by Hastur’s presence. On a failed save, the creature’s Constitution score is reduced by 1d4 until restored by a greater restoration spell or similar magic. If this would reduce the creature’s Constitution score to 0, it dies instead. At the start of the next round, the creature is transformed into a chaotic evil Mythos undead under Hastur’s control. All reductions to the new undead creature’s ability scores caused by Hastur are undone.
Zyngaya spell.
Insane Dead: Certain alchemical techniques can reanimate recently slain bodies, but while these methods restore the semblance of life to the victim, the passage of death to life always results in insanity.
Yellow Sign Attendant, Mythos Undead Bard 7: ?
Deathless Wizard, Mythos Undead Mage: It made a deal with a Great Old One to never die and in exchange it serves its master faithfully.
Risen Warlock, Mythos Undead Warlock 20: ?
Grave-Gorging Undead: ?
Flesh-Eating Undead Creature: ?
Sentient Undead: ?
Intelligent Undead: ?
Mindless Undead: ?
Ancient Sentient Undead: ?
Undead Cultist: ?
Undead Horror: ?
Mummified Undead: ?
Chaotic Evil Mythos Undead: Hastur's Possession power.
Friendly Ghost: ?
Ghost, Simple Ghost, Typical Ghost: The King [in Yellow]’s footstep brings the dead to life. They can return as a wide variety of undead, from simple zombies or ghosts to more powerful creatures such as vampires.
Ghost of Ib: ?
Ghoul, Undead Ghoul, Monstrous Undead Ghoul: Becoming a Mythos ghoul through magic is rare. Certainly, curses and magical infections can cause ghouls to manifest as well, but ghouls cannot “infect” their victims like a disease or lycanthrope. Most who become cursed or otherwise transformed into ghouls meet their fate not through interaction with ghouls, but through powerful magic or curses in old tombs, from reading forbidden texts, or by taking part in blasphemous rituals. In fact, those who pursue it often find themselves accidentally turning into undead ghouls.
Spectral Frog-Like Humanoid: ?
More Powerful Creature: ?
Insanely Powerful Lich: ?
Allip: ?
Demilich: ?
Arkantos, Lich: ?
Mummy, Undead Mummy: ?
Shadow: ?
Spirit: ?
Vampire: The King [in Yellow]’s footstep brings the dead to life. They can return as a wide variety of undead, from simple zombies or ghosts to more powerful creatures such as vampires.
More Powerful Creature: ?
Vampiric Mist: ?
Will-o'-Wisp: ?
Zombie, Simple Zombie, Typical Zombie: A major disturbing discovery (such as realizing that your father was a deep one or that by activating the strange magical artifact in a dungeon you have transformed the entire populace of the city above into zombies) causes three levels of dread unless the character succeeds at a DC 20 Wisdom saving throw.
The King [in Yellow]’s footstep brings the dead to life. They can return as a wide variety of undead, from simple zombies or ghosts to more powerful creatures such as vampires.
Zyngaya
7th-level necromancy
Casting Time: 1 hour
Range: 60 feet
Components: V, S, M (a clay pot filled with grave dirt and an onyx gem worth 200 gp)
Duration: Instantaneous
You transform a corpse you can see into a Mythos undead if the original creature’s challenge rating (or level) was 7 or lower. It is loyal to the King in Yellow. Although it recognizes you as its creator, it works with you only insofar as you serve the purposes of the King in Yellow. You have advantage on Charisma (Persuasion) checks to influence the undead as long as your interests do not conflict with those of the King in Yellow. If you are capable of commanding the undead with magic or other abilities, you may attempt to use these abilities on the undead creature as it forms.
At Higher Levels. When you cast this spell using a spell slot of 8th level or higher, increase the maximum challenge rating of creature you can affect by 1 for each slot level above 7th.
Possession. Whenever a creature ends its turn linked to a Quantum Nucleus, it must succeed on a DC 18 Constitution saving throw or be physically transformed by Hastur’s presence. On a failed save, the creature’s Constitution score is reduced by 1d4 until restored by a greater restoration spell or similar magic. If this would reduce the creature’s Constitution score to 0, it dies instead. At the start of the next round, the creature is transformed into a chaotic evil Mythos undead under Hastur’s control. All reductions to the new undead creature’s ability scores caused by Hastur are undone.