After a hiatus it is back! Saturday Creature Factory returns. This time with a 5E edition of something I used in a published module...
Living Godflesh of Umbras
CR 6 (2,300 XP)
CN Large Monstrosity (though some would call it an aberration)
HP 152 (15D10+70)
Resistance: psychic, cold, acid and radiant
Immunity: necrotic, poison, disease, prone condition (unless in risen form), frightened
Speed 10 feet
Multiattack special, see below.
Melee Attack – Sucking Maws +7 attack (melee, each target adjacent to or occupying the same area as the living godflesh), 1D6+4 bludgeoning/crushing damage to each target.
Melee Attack - Flesh Absorbption +7 attack (melee, target must be occupying same area as living godflesh), 4D6 acid damage and living godflesh gains damage dealt in additional hit points. If a target is reduced to zero hit points the living godflesh gains one divine spark. When it gains 10 divine sparks the living godflesh gains 18 intelligence, 18 wisdom and polymorphs into a medium humanoid form for one day.
STR 18 (+4), DEX 14 (+2), CON 18 (+4), INT 6 (-2), WIS 10 (0), CHA 10 (0)
Languages: none (but in risen godflesh form it gains common and either abyssal or primordial)
Senses: Superior Darkvision, tremorsense
Absorbing Mass: when the living godflesh moves into an area occupied by another creature, the target must make a DC 15 Strength saving throw or be grabbed by the living godflesh. It subsequently gains advantage on all attacks against that target and may initiate the flesh absorption attack.
Stories tell of a shadow god called Umbras who was slain by rival demiurges that took his place. The story says he was trapped in a planar gate that simultaneously opened…and then closed…on ten thousand locations, each one severing a piece of flesh from Umbras. The living godflesh might be the remains of this deity, now trapped in infinite planes of existence trying to pull itself together.
The living godflesh seeks to attain 10 divine sparks, which allows it to attain a moment’s clarity of mind for a day, and seek out a way to find other pieces like itself. Unfortunately each piece of godflesh is a dim shadow of the being it once was, with no magic ability to manifest in other planes and reassemble it’s lost form.