Yuan-ti AnathemaHuge monstrosity (shapechanger yuan ti)
Magic Resistance. The anathema has advantage on saving throws against spells and other magical effects.
Ophidiophobia Aura. Any creature of the anathema’s choice, other than a snake or a yuan-ti, that starts its turn within 5 meters of the anathema and can see or hear it must succeed on a DC 17 Will saving throw or become frightened of snakes and yuan-ti. A frightened target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success. If a target’s saving throw is successful or the effect ends for it, the target is immune to this aura for the next 24 hours.
Six Heads. The anathema has advantage on Perception checks and on saving throws against being blinded. charmed, deafened, frightened, stunned, or knocked unconscious.
Spellcasting (Yuan-ti form only). The yuan-ti anathema’s spellcasting ability is Charisma (spell save DC 17, +9 to hit with spell attacks). It has 11 mana, a mana limit of 2, regains all expended mana when it finishes a long rest and regains half its total mana (rounded up) when it finishes a short rest. It knows the following spells:
At will: animal friendship (snakes only)
1 mana: agonizing bargain, bane, confusion poison, detect evil and good, detect poison, divine emissary, divine word, envenomed weapon, hinder, hypnotize, poison burst, protection from evil and good, protection from poison, putrefy food and drink, ray of sickness, sanctuary, shield of faith, slowing poison, toxic fumes
2 mana: bestow curse, cloudkill, commune, fiendish calling, guardian of faith, hallow, halo of spores, hurl through hell, insanity mist, leathery wings, noxious plume, paralytic poison, poison bane, spirit guardians, spiritual weapon, stinking cloud
Variant: Chameleon Skin. The yuan-ti has advantage on Stealth checks made to avoid being noticed.
Variant: Shed Skin (1/long rest). Once on its turn, the yuan-ti can shed its skin to free itself from a grapple, shackles, or other restraints. If the yuan-ti spends 1 minute eating its shed skin, it regains health equal to half its maximum health.
Claw (Yuan-ti form only). Melee Weapon Attack: +10 to hit, reach 2 m. Hit: 13 (2d6 + 6) slashing damage.
Constrict (1/turn). Melee Weapon Attack: +10 to hit, reach 3 m., one Large or smaller creature. Hit: 16 (3d6 + 6) bludgeoning damage plus 7 (2d6) acid damage, and the target is grappled (escape DC 18). Until this grapple ends, the target is restrained and takes 16 (3d6 + 6) bludgeoning damage plus 7 (2d6) acid damage at the start of each of its turns, and the anathema can’t constrict another target.
Flurry of Bites (1/turn). Melee Weapon Attack: +10 to hit, reach 2 m. Hit: 27 (6d6 + 6) piercing damage plus 14 (4d6) poison damage.
Change Shape (1/turn). The anathema can polymorph into a Huge giant constrictor snake, or back into its true form. its statistics are the same in each form. Any equipment it is wearing or carrying isn’t transformed.
Variant: Acid Slime (1/turn). The yuan-ti can coat its body in a slimy acid that lasts for 1 minute. A creature that touches the yuan-ti, hits it with a melee attack while within 1 meter of it, or is hit by its constrict attack takes 11 (2d10) acid damage.
No concoctions, maneuvers, or spells
All monsters in this system should have maneuvers or spells. You should add some maneuvers or spells to this monster. If you do so, please make a suggestion on github so I can finish adding maneuvers and spells to all monsters via https://github.com/mlenser/kryx-rpg-issues/issues/9