Logos (5e Creature)
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Huge celestial, lawful neutral
Saving Throws Str +10, Int +8, Cha +8
Living Fire. A creature that touches the logos, starts its turn within 5 feet of it, or hits it with a melee attack while within 15 feet of it takes 6 (1d12) fire damage plus 6 (1d12) radiant damage and catches fire; until someone takes an action to douse the fire, the creature takes 11 (2d10) fire damage at the start of each of its turns.
Innate Spellcasting. The logos' innate spellcasting ability is Wisdom (spell save DC 19, +11 to hit with spell attacks). It can innately cast the following spells, requiring no material components:
Rekindle. Instead of dying if reduced to 0 hit points, the logos becomes diminished; it is unconscious and cannot be damaged. 3 days after this happens, the logos returns to life with all of its hit points; the only way this can be prevented is if another creature stands within 5 feet of the logos and uses the spell wish to extinguish it while it has yet to recover.
Multiattack. The logos makes five Fiery Burst attacks.
Fiery Burst. The logos launches three motes of holy fire; each flies towards a target of its choosing within 90 feet of it, which must be within 10 feet of another target. Each target makes a DC 20 Dexterity saving throw, taking 3 (1d6) fire damage plus 3 (1d6) radiant damage on a failed save or half as much damage on a success. Additionally, each creature within 5 feet of a target must make a DC 18 Constitution saving throw successfully or become blinded for 1 minute. The motes all strike simultaneously, and the logos can direct them to hit one target or several.
The logoi are living flame, commandments of the laws of suns, utterances of fire and glory. They are decrees, they are statements about how the world should be, they are giant wheels of spinning fire. At the logos' core, angles of fierce light burn: charred and glowering sigil-skeletons. The main symbol can be translated as "To Become Fire Rather Than Be Burned".
Variant: The Fire that Follows
A unique logos which relentlessly hunts down lesser beings who learn the secrets of the suns and manifests as electric blue flames. Aside from the following differences, the fire that follows is identical to a normal logoi: it has an Intelligence score of 14, an AC of 18, the spell fire storm instead of plane shift, and can cast scrying once per day.