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Ostrox Boneglaive

Ostrox Boneglaive

Undead Hordes · Void · Epic

Stars
4★
In teams
0
Best tier
S
Role
Support

Full-uptime AoE Block Buffs + AoE Inc ACC 50% + cleanse + debuff reflect/transfer.

Also aids Hydra alongside Gwyndolin.

GearSpeed · Perception · Immortal
StatsSPD › ACC › HP%
BuildHydra Block Buffs / Inc ACC / cleanse seat: act first so Block Buffs is up before heads cycle and Inc ACC lands before the team's debuffers move. Own ACC must be real — he can't lean on his own A3 for the opening A2. 215 is the hydra Normal floor; 250+ is comfortable headroom. Ignore ATK/C.DMG entirely.
BlessingCrueltySurvival Instinct
Skill floorA2 (Spinal Surge) fully booked is the floor: chance +25% (75→100%) and Cooldown -1 (4→3) — vs 4 hydra heads that's a 3-turn Block Buffs debuff on a 3-turn cycle, i.e. permanent uptime. A3 (Death Perception) Cooldown -2 (6→4) strongly recommended — Inc ACC uptime is what lets teammates run the 165-ACC hydra discount.
AyumiLoveHellHades

Content ratings — where this champion earns their roster slot

Gear plan — sets, main stat per slot, and where to land

Sets
4×Speed— act-first support; hydra fights are long — turn count is throughput
2×Perception— ACC + SPD in one bonus toward the 250 targets
Slots
WeaponATK
HelmetHP
ShieldDEF
GauntletsHP%
ChestplateBlock Buffs on heads is the whole seat — own ACC, not his A3 buffACC
Bootsmust pre-empt head buffs and the team's debuffersSPD
RingHP
AmuletHP
BannerACC
Targets
SPD250+
ACC250+ (215 hydra floor)
HP40k+
ATKignore
C.DMGignore

Masteries — the build path; capstones highlighted

Deadly PrecisionKeen StrikeHeart of GlorySingle OutBring it DownMethodicalPinpoint AccuracyCharged FocusSwarm SmiterRapid ResponseLore of SteelCycle of MagicDefiantRetributionWarmasterLasting GiftsMaster Hexer

Appears in

Dragon's Lair
Swap — The hard-mode build target, and the audit found the mechanic that justifies him: HH 10/10 Dragon AND 10/10 Dragon Hard (Ayumi 5★/5★), the best pair on the roster. A2 Spinal Surge lands AoE [Block Buffs] at 75% — dead weight in normal mode (Hellrazor buffs nothing) but live against Tainted Hellrazor's self-applied 50% Increase ATK. A3 Death Perception removes 1 random debuff from ALL allies and grants 50% Increase ACC (CD 6→4 booked). A1 transfers one of his own debuffs onto the target and heals the lowest-HP ally 10% of HIS MAX HP. Aura: +40 Ally ACC in all battles, the roster's second-largest. 4★, queue #35 — the one build that would change this team's hard-mode ceiling.
To-do
Minotaur's Labyrinth
Swap — Cleanse + AoE 50% Inc ACC if debuffs still miss after Supreme Kael's A3 pre-cast; his Block Buffs is wave-only (Rage cannot be blocked). Queue #35.
To-do
Hydra
Swap — AoE Block Buffs at 100% booked for 3 turns vs 4+ enemies on a CD-3 cycle (permanent uptime) plus a cleanse and debuff reflect — bring him specifically when Wrath's Vengeance buff or Decay's Life Barrier is the problem. Demoted from a seat: his 50% Inc ACC is the same buff Gwyndolin casts on a faster cycle, and his +40 ACC aura loses to hers. 4★, queue #35.
To-do

Best for

HydraMinotaurDragonFaction Wars