Xyron
Xyron — The Encounter
Horned cinder-priest who reads omens in burning bone · a boss your table can run with almost no prep. SRD 5.1-compatible.
Who Is Xyron
Where lesser devils tally souls, Xyron reads them. He is named in the marginalia of the Lesser Key as a lawful spirit of the burning order, a priest of the infernal hierarchy who divines fortune in the cracking of heated bone. Petitioners who climb to his ash-strewn shrine bring a skull and a question; he heats it on his staff until it splits, and in the pattern of the fissures he speaks an omen that has never once proven false, though it has often proven fatal. The flames that gnaw his cloak never consume it, for he long ago bargained the fire of his own damnation into a servant. Scholars of the seventy-two spirits warn that Xyron does not lie and does not bargain in his own favor; he simply tells the truth in the cruelest order the words allow, and lets the seeker walk willingly into it. Cults raise him braziers and feed them the teeth of the faithless.
Run Xyron in Sixty Seconds
- What he is: a ranged fiend-controller, not a brawler. Keep him at distance behind his minions and make the party come to him through fire.
- Open with Ember Lance on the healer to lock off hit-point recovery, then spend Cinder Augury to spoil the party's single most important d20 of the round.
- Kill-priority: ignore the tank entirely. Hit the squishy back line; that is the whole point of his teleport and 120-foot range.
- When bloodied: Ashen Step every turn to stay untouchable, lean on Smoldering Ward to make melee hurt, and hold Bone Choir for the moment three or more PCs cluster.
- Three ways to run him: (1) cult ringleader behind a wall of acolytes, (2) lair oracle who buffs a bigger boss, (3) ambush sniper who opens with Bone Choir then kites. Never solo.
Xyron
Medium fiend (devil), lawful evil
CR 6 · 2,300 XP · GUIDELINEMagic Resistance. Xyron has advantage on saving throws against spells and other magical effects.
Cinder Augury. Signature. Once per turn, when Xyron sees a creature within 60 ft. roll a d20, he may read the omen in his burning staff and force that creature to reroll, taking the lower of the two results. He then takes 3 (1d6) fire damage as the embers gutter.
Actions
Multiattack. Xyron makes two attacks with his Hellfire Staff, or casts a spell and makes one Hellfire Staff attack.
Hellfire Staff. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 11 (2d6+4) bludgeoning damage plus 7 (2d6) fire damage.
Ember Lance. Ranged Spell Attack: +7 to hit, range 120 ft., one target. Hit: 18 (4d8) fire damage, and the target must succeed on a DC 15 Constitution saving throw or be unable to regain hit points until the end of its next turn.
Bone Choir (Recharge 5-6). Xyron strikes the skulls at his feet and they scream. Each creature within a 20-foot-radius sphere centered on a point Xyron can see within 60 ft. must make a DC 15 Wisdom saving throw, taking 24 (7d6) psychic damage on a failed save and becoming frightened of Xyron until the end of its next turn, or half as much damage and not frightened on a success.
Bonus Actions & Reactions
Ashen Step. Bonus Action. Xyron vanishes in a puff of cinders and teleports up to 30 ft. to an unoccupied space he can see.
Smoldering Ward. Reaction. When Xyron takes damage from a creature within 30 ft., he wreathes himself in flame; the attacker takes 7 (2d6) fire damage.
A horned, red-skinned cinder-priest crouches amid a litter of skulls, one fist clenched around a barbed staff that drips living flame, his spiked black pauldron and tattered ember-cloak still smoking from the last rite.
Xyron, Bound
Companion · acts on your initiative
Bound · GUIDELINEOmen-Touched (signature). Once per turn, when an ally Xyron can see within 30 ft. hits with an attack, Xyron may add 4 (1d8) fire damage to the hit as cinders flare across the wound.
Actions
Brand-Whip. Melee Weapon Attack: +6 to hit, reach 10 ft., one target. Hit: 9 (1d10+4) slashing damage plus 4 (1d8) fire damage.
Reactions
Read the Cinders. Reaction. When a creature within 30 ft. of Xyron makes a saving throw, she may grant it advantage on that throw as she whispers the next line of the omen.
A scarred acolyte chained to Xyron's service, carrying the brazier and reciting the omens she is forbidden to understand.
Guideline numbers — formula-tuned and read from the miniature's design, not yet table-proven. Tell us how it ran in the comments.
How It Fights — by Tier
Same creature, scaled threat. The traits never change; only the numbers move.
Open with Ember Lance on the party's healer so they can't be patched up, then fall back behind cover. If the party clusters, hold Bone Choir for the moment three or more stand inside the 20-foot sphere. Pair Xyron with a melee bruiser or a knot of cultists; he is a ranged controller, not a frontliner.
Open with Ember Lance on the cleric or bard to shut off healing, then Cinder Augury the round's biggest d20 (the rogue's attack, a save-or-suck spell). Kill-priority: ignore the tank, punish the squishy casters; use Ashen Step to break melee and Bone Choir when bodies bunch. Best fielded beside a bigger frontline threat or his own cultist mob.
Run him as the ranged brain of a warband or lair fight, never alone. Open Ember Lance + Bone Choir on the clumped party, then Ashen Step out of reach each round and let minions hold the line. Pair him with a heavier melee boss or summoned devils; his Cinder Augury and Smoldering Ward make any martial that closes on him bleed.
Put Xyron on the table
Download the presupported STL and run the fight tonight — the model, and the encounter that comes with it.
Get the STL on MyMiniFactory →Clay Cyanide Companion Rules v1
How a bound creature acts
- A companion acts on its owner's initiative, immediately after the owner.
- It uses the Companion block above — roughly ×0.6 HP and damage, no recharge abilities, and at most one reaction trait.
- It moves freely; it takes its Action only while its owner is conscious.
- At 0 HP a companion is broken, not dead — restored on a long rest unless your table rules otherwise.
Original Clay Cyanide material © Clay Cyanide LLC — explicitly not the non-SRD official sidekick rules.
Questions, Asked at the Table
What CR is Xyron?
Xyron is built at CR 6 (2,300 XP) in his native Tier 2 form, a fair spotlight threat for a party of levels 5-10. Scaled stat blocks for Tier 1 (levels 1-4) and Tier 3 (levels 11-15) are provided so you can drop him into almost any table.
Can Xyron be a companion or ally?
Not Xyron himself; he is a devil who bargains only in his own favor. His bound acolyte Vessa is provided as a companion stat block (AC 14, 74 HP) who can ride along with a party that frees or co-opts her, lending omen-touched fire damage and a save-granting reaction.
Is Xyron a boss or an add-on?
An add-on. He has no legendary actions and is meant to fight beside a bigger threat or his own cultist mob; field him as the controlling brain of an encounter, not as a lone solo boss.
Tell Us How It Ran
This work includes material taken from the System Reference Document 5.1 ("SRD 5.1") by Wizards of the Coast LLC and available at dnd.wizards.com/resources/systems-reference-document. The SRD 5.1 is licensed under the Creative Commons Attribution 4.0 International License available at creativecommons.org/licenses/by/4.0/legalcode.
Clay Cyanide Miniatures is not affiliated with, endorsed, sponsored, or specifically approved by Wizards of the Coast LLC. This content is compatible with the fifth edition of the world's most popular fantasy roleplaying game. Companion rules, lore, names, and original mechanics © Clay Cyanide LLC.
Technical Specifications
32mm, 75mm
STL, Pre-supported STL
Standard or ABS-like resin, 0.05mm layer height
Yes — ready to print, optimized supports included
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