Surtur
Surtur — The Encounter
Fire-giant who guards the world's edge with a flaming blade · a boss your table can run with almost no prep. SRD 5.1-compatible.
Who Is Surtur
From Muspelheim, the realm of primal fire that lay before the worlds were shaped, Surtur stands sentinel at its flaming border. The old tellings name him eldest of the fire-giants, his sword brighter than the sun, the blade he keeps for the day of doom. When the long winter breaks and the bridge of the gods shatters under marching feet, it is Surtur who rides foremost from the south, fire before him and fire behind. He is fated to meet the harvest-god Freyr in the final battle, to fell him, and when the last of the gods has fallen, to fling his fire across all the nine worlds until earth and sky alike are swallowed and sink burning into the sea. He is not malice so much as inevitability given a blade. Where he treads, stone runs like wax and the air itself blackens, and those who would oppose him learn that fire keeps no quarter and grants no mercy.
Run Surtur in Sixty Seconds
- Hold: Surtur is fire incarnate. Immune to fire damage and Heat Aura ticks 2d6 to everyone within 10 ft. at the start of his turn, so any fire-themed party trick is wasted on him and standing next to him bleeds HP.
- Open: Ember Step through the tightest knot of PCs for a free line of flame, then Multiattack. Sword on the biggest threat, tail to knock a striker prone.
- Kill-priority: he hunts the squishiest high-damage target, but Searing Riposte means whoever melees him pays 2d8 fire each hit — reward ranged attackers, punish dogpiles.
- When bloodied: drop the maneuvering. Stand in the party, Cleaving Brand every legendary action, and let the heat aura and riposte grind them down while you chase the healer.
- Three ways to run him: true solo boss at Tier 3; a Ragnarok set-piece with an Eldjotun Whelp and lava-vent lair at Tier 2; a single doom-clock add beside a flagship at Tier 1.
Surtur
Huge giant (fire), chaotic evil
CR 11 · 7,200 XP · GUIDELINEHeat Aura. At the start of each of Surtur's turns, each creature within 10 feet of him takes 7 (2d6) fire damage. A creature that ends its turn there takes the same damage.
Brand of Ragnarok. Signature. Surtur's flaming sword is wreathed in world-ending fire. His weapon attacks deal an extra 9 (2d8) fire damage (included below), and a creature reduced to 0 hit points by the sword bursts into flame, dealing 7 (2d6) fire damage to each creature within 5 feet of it.
Siege Monster. Surtur deals double damage to objects and structures.
Actions
Multiattack. Surtur makes two attacks: one with his flaming sword and one with his tail.
Flaming Sword. Melee Weapon Attack: +11 to hit, reach 10 ft., one target. Hit: 23 (3d8 + 7) slashing damage plus 9 (2d8) fire damage.
Tail. Melee Weapon Attack: +11 to hit, reach 15 ft., one target. Hit: 18 (3d6 + 7) bludgeoning damage, and the target must succeed on a DC 17 Strength saving throw or be knocked prone.
Bonus Actions & Reactions
Searing Riposte. Reaction. When a creature Surtur can see hits him with a melee attack while within 10 feet, he can lash out, dealing 9 (2d8) fire damage to that creature.
Legendary Actions (3/Round)
Tail Sweep. Surtur makes one tail attack.
Ember Step (Costs 1 Action). Surtur moves up to half his speed without provoking opportunity attacks, leaving a 10-foot line of flame in his wake. Each creature in that line takes 7 (2d6) fire damage (DC 17 Dexterity save for half).
Cleaving Brand (Costs 2 Actions). Surtur makes one flaming sword attack against each creature within 10 feet of him.
A towering fire-giant of scaled grey hide and curved horns, one taloned claw clutching a brand of living flame while a clubbed serpent-tail drags across scorched stone.
Surtur, Bound
Companion · acts on your initiative
Bound · GUIDELINELiving Coal (signature). The whelp's body radiates heat. A creature that touches it or hits it with a melee attack within 5 feet takes 4 (1d8) fire damage.
Actions
Burning Claw. Melee Weapon Attack: +7 to hit, reach 5 ft., one target. Hit: 13 (2d8 + 4) slashing damage plus 4 (1d8) fire damage.
Reactions
Flare Up. When an ally within 15 feet is reduced to 0 hit points, the whelp erupts, dealing 7 (2d6) fire damage to each creature within 10 feet of it (DC 14 Dexterity save for half).
A lesser child of the fire-realm, half Surtur's height, its coal-veined hide glowing where the flame leaks through.
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 the flaming sword on the toughest-looking PC and let Heat Aura punish anyone who closes. Use the tail to knock a melee striker prone, then focus the prone target. Pair Surtur with a lair of vents and lava channels rather than running him solo at this scale.
Lead with Ember Step to split a clustered party with a line of flame, then Multiattack the squishiest caster. Save Searing Riposte for the front-line tank. When bloodied, stop maneuvering and just Cleave anyone in reach.
True solo: open by Ember Stepping through the cluster, then Multiattack the highest-damage PC. Spend legendary actions on Cleaving Brand when two or more are in reach, Tail Sweep otherwise. When bloodied, lean on Searing Riposte and the heat aura to make melee a losing trade and chase healers.
Put Surtur 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 Surtur?
Natively CR 11 (Tier 3, levels 11-15). Because he carries a full legendary-action kit plus a punishing reaction, his sheet drops one band from the raw Tier 3 ceiling — he plays up as a genuine solo boss. Scaled stat blocks for Tier 1 (~CR 2) and Tier 2 (~CR 6) are provided for lower-level parties.
Can Surtur be a companion or ally?
Surtur himself is a world-ending boss, not an ally. For a fire-giant ally, use the Eldjotun Whelp companion block — AC 15, 110 HP, a burning claw, a Living Coal aura, and a Flare Up reaction when a nearby ally falls.
How do I keep Heat Aura and Searing Riposte from feeling unfair?
Telegraph them. Describe the shimmering air and the molten footprints before combat so players choose to fight at range or accept the burn. The aura and riposte are the whole point — they make melee a deliberate, costly choice rather than the default, which is exactly how a Ragnarok-bringer should feel.
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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