Hero Siege Demonspawn Blood & Bone Build (Season 10) — S-Tier Bone Barrage
Demonspawn Blood & Bone is a cross-source consensus S-tier Arcane caster archetype for Hero Siege Season 10 Ebontharn — not a single skill. Three S10-dedicated sources map the same archetype three different ways, so this page presents them as a variant matrix with a shared endgame gear core.
60-second read. “Blood & Bone” is an archetype umbrella term for a Demonspawn Arcane caster running one of four interchangeable primary skills (Bone Barrage, Bone Storm, Bone Fragments, Blood Surge) around a shared Arcanist gear core ([F065]). Three S10-dedicated sources agree on the archetype but split on the main mapping / clear skill — MisterSleepyCat picks Bone Barrage, graxyguides picks Bone Storm, odealo (S9 baseline) picks Blood Surge. For single-target boss damage all three converge on Bone Fragments ([C012], [F055], [F061], [F064]).
Naming note. Vortex Gaming’s “Ban Barrage” is a typo of the in-game skill Bone Barrage (Demonspawn Lv 48 Bone Conjurer). herosiegebuilds’ “Blood & Bone” is the community umbrella term. All three names (“Ban Barrage” / “Blood Surge” / “Blood & Bone”) point at the same Arcane caster archetype in this build family ([F054]).
For why this archetype sits at cross-source consensus S-tier, see the Season 10 class tier list ([F049]).
Archetype overview
- Primary damage — pick one ([F065]): Bone Barrage, Bone Storm, Bone Fragments, Blood Surge.
- Shared support skills: Ominous Aura (Arcane damage aura), Impale + AoE sub-node early ([F057]), Blood Bolts as early / boss fallback ([F056]).
- S10 vs S9: no meaningful endgame changes to the archetype in S10; only a Blood Bolts sub-skill swap noted ([F056]).
3-source S10 variant matrix
Reviewed 2026-08-23. odealo is S9-baseline (labelled) and used only where its picks are still current per S10 sources.
| Dimension | MisterSleepyCat S10 ([F055] / [F058] / [F059]) | graxyguides “Boner Spawn” S10 ([F061] / [F062]) | odealo S9 baseline ([F064]) |
|---|---|---|---|
| Mapping / clear main | Bone Barrage (AoE chain) | Bone Storm (Lv 8–15 max) | Blood Surge (Lv 40+ AoE) |
| Boss single-target | Bone Fragments (proximity “hugging”) | Bone Fragments (loadout swap) | Bone Fragments (dedicated swap) |
| “Extremely geared” alt | Blood Surge (big-radius farming) | Blood Surge / Bone Barrage alt | — |
| Main aura | (not listed) | Ominous Aura (Arcane damage) | — |
| Stat split | 200 Int + 200 Vit ([F058]) | (not listed) | — |
| Endgame gear consensus | Sur runes late; Iris / Sands of Time / Celestus weapons ([F059]) | Blood of Abaddon staff (“GG EZ”) + Celestial’s Authority shield ([F062]) | Beacon of Shadows / Oculus of Ages + Celestial’s Authority + Arcanum Asphyxiators ([F064]) |
| Off-hand / rune | Sur rune stack | Skysong / Divine Contemplation off-hand; Scholar helm; Quicksteps / Ghost boots ([F062]) | — |
Shared endgame gear core across all three sources. Bone Fragments for boss single-target, Blood of Abaddon staff and Celestial’s Authority shield in the endgame set — that convergence is the safest anchor if you are choosing gear before you know which mapping skill you will run.
Skill selection decision tree
Because C012 (main-skill split) is unresolved, treat main-skill as an output of your gear tier and farm goal, not an input:
- Levels 1–8: Impale with the AoE sub-node picked up ([F057]) or Blood Bolts as early damage ([F056]).
- Levels 8–15 — want quick mapping now: shift to Bone Storm (graxyguides path).
- Levels 15–40 — transition: Blood Bolts remains the boss-fight fallback if you stall out ([F056]).
- Level 40+ once you are in endgame gear:
- Own Blood of Abaddon staff + Arcanum Asphyxiators → run Blood Surge (odealo path).
- No endgame staff yet, want chain-clear feel → run Bone Barrage (MisterSleepyCat path).
- Want a stable mapping loadout with dedicated boss swap → run Bone Storm + Bone Fragments swap (graxyguides path).
- Any boss single-target fight: swap to Bone Fragments (all three sources agree).
Stat and Incarnation
- Attribute split at the 400-point milestone: 200 Intelligence + 200 Vitality ([F058]).
- Incarnation Tree priorities: skill duration, cast speed, mana regen, leech acquisition ([F058]).
- Rune plan late game: Sur stacking for mana pool ([F059]).
Gear progression (three-stage, graxyguides + MisterSleepyCat picks)
Fresh-100 stage ([F062]):
- Skysong (off-hand), Damien’s Head, Rift Eye, Thor Set pieces.
Mid-progression stage ([F062]):
- Blood of Abaddon (staff), Spell Eater, Celestial’s Authority (shield).
Endgame stage ([F062]):
- Blood of Abaddon (staff), Beacon of Shadows, Celestial’s Authority (shield).
MisterSleepyCat’s endgame pool ([F059], parallel option): Iris / Sands of Time / Earth Shaper’s Talons / Celestus / Thor’s Battle Sword for weapons; Rift Eye or Skysong for off-hand; Witches Brimmed Hat or Curator of Secrets for head; Crown of Doom or Pearlescence as flavour picks.
Rotation and combat feel
Confirmed structure:
- Cast your chosen main skill from the matrix above.
- Keep Ominous Aura active as passive Arcane damage.
- Swap to Bone Fragments for single-target boss windows.
Coverage Gap — per-second rotation. No cross-source verified per-second cast order or buff-uptime cadence is published across the three S10 sources reviewed on 2026-08-23.
Wormhole performance (cross-source qualitative)
MisterSleepyCat explicitly labels this archetype “a top-tier caster” for endgame play, and cross-source consensus in the tier list puts it at S ([F049]). For the mechanical picture of Wormhole in S10 — including the S10 XP / loot rule change — see the Wormhole guide.
Coverage Gap — numeric benchmarks. No reliable cross-source numeric clear-time or gear-tier vs Wormhole-level benchmark is published for this archetype.
Common deaths and mitigation
Two-source convergence ([F060], [F063]):
- Cause — no built-in teleport / mobility. Bone Fragments forces close-range engagement; without escape you eat boss telegraphs.
- Cause — no built-in damage reduction. High FCR builds can also spike client lag at cap.
- Mitigation — invest in mana shield and split attributes toward Vit ([F060]).
- Mitigation — Quicksteps or Ghost boots to add movement speed ([F063]).
- Mitigation — stack life and pick at least one defensive item ([F063]).
Mercenary
Coverage Gap — archetype-specific pick. All three S10 sources only give generic mercenary advice for this build. Use the Paladin page’s Knight (defensive) or Archer / Ranger (buff uptime) picks as a placeholder — this is a generic Hero Siege mercenary pattern, not a Blood & Bone-specific recommendation.
Sources and verification date
All external sources below were checked 2026-08-23.
- MisterSleepyCat — S10 Blood and Bone Demonspawn — Bone Barrage variant, S10 vs S9 changes, leveling priority, stats/runes/incarnation, gear, weaknesses ([F055]–[F060], [F065]).
- Graxy Guides — “Boner Spawn” S10 Demonspawn build — Bone Storm variant + Ominous Aura + gear ladder + weaknesses ([F061], [F062], [F063]).
- odealo — Blood Surge Demon Spawn build (S9 baseline) — Blood Surge variant + shared endgame gear anchor ([F064]).
- Vortex Gaming — Hero Siege Season 10 Hero Tier List Analysis — origin of “Ban Barrage” typo, resolved to Bone Barrage ([F054]).
- herosiegebuilds — Incarnation Rankings (S9) — origin of “Blood & Bone” umbrella term ([F054]).
Internal Fact IDs like [F055] are the audit trail; the URLs above are the public citation.
Coverage gaps disclosed on this page
- Per-second rotation micro-order
- S10 Wormhole clear-time numeric benchmark
- Blood & Bone-specific mercenary recommendation