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Ossecati, Boneshaper
Location(s) Entombed Chamber
Resistance(s) Chaos
Skill(s) Infernal Blow
Summon Skeleton
Vaal Slam

Ossecati, Boneshaper is the vaal side area boss for the Entombed Chamber. He is a Colossal Bonestalker.


  • Infernal BlowInfernal BlowAttack, AoE, Melee, Strike, Fire, Duration
    Level: (1-20)
    Cost: 6 Mana
    Attack Damage: (103-133)% of base
    Effectiveness of Added Damage: (104-133)%
    Radius: 15
    Requires Level 12Attacks with your weapon, applying a charged debuff to enemies hit by your strike, and an uncharged debuff to any other enemies hit. Upon reaching 6 charges, expiring, or the enemy's death, the charged debuff is removed, and it deals damage to that and other nearby enemies. Enemies with either debuff explode when they die, damaging other nearby enemies. Damage from this explosion cannot be reflected. Requires a Sword, Axe, Mace, Sceptre, Staff or Unarmed.Per 1% Quality:1Superior2Anomalous3Divergent4Phantasmal0.5% increased Area of EffectExplosion has 1% chance to apply Uncharged Debuff on Hit3% increased Burning Damage
    1% chance to Ignite enemies
    4% increased Skill Effect Duration
    Deals (103.9-133)% of Base Attack Damage
    60% of Physical Damage Converted to Fire Damage
    Base duration is 0.8 seconds
    Explosion deals base Fire Damage equal to 6% of the corpse's Maximum Life
    Debuff deals 66% of Damage per Charge
    (5-75) to (8-113) Added Fire Damage
    +(0-2) to Melee Strike Range
    Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
    Infernal Blow skill icon.png
  • Summon SkeletonsSummon SkeletonsSpell, Minion, Duration
    Level: (1-20)
    Cost: (4-12) Mana
    Cast Time: 0.50 sec
    Requires Level 10Summon Skeleton Warrior minions at the targeted location. They use a melee attack and die after a duration. If made aggressive, Skeleton Warriors will also dash towards nearby enemies.Per 1% Quality:1Superior2Anomalous3Divergent4PhantasmalMinions deal 1% increased DamageMinions can't be Damaged for 0.1 seconds after being SummonedMinions' Attacks have 0.5% chance to Maim Enemies on Hit5% chance to Summon a Skeleton Archer instead of a Skeleton WarriorSummons (2-3) Skeleton Warriors
    Maximum (5-7) Summoned Skeletons
    Base duration is 20 seconds
    Minions gain 50% more Added Damage
    Place into an item socket of the right colour to gain this skill. Right click to remove from a socket.
    Summon Skeletons skill icon.png
    supported by Cast when Damage Taken SupportCast when Damage Taken SupportSupport, Spell, Trigger
    Icon: !
    Level: (1-20)
    Cost & Reservation Multiplier: 250%
    Cooldown Time: 0.25 sec
    Can Store 1 Use(s)
    Requires Level 38Each supported spell skill will track damage you take, and be triggered when the total damage taken reaches a threshold. Cannot support skills used by totems, traps, or mines. Vaal skills, channelling skills, and skills with a reservation cannot be triggered.Per 1% Quality:1Superior2Anomalous3DivergentSupported Skills deal 0.5% increased DamageSupported Skills have 1% increased Skill Effect DurationSupported Skills require 1% reduced amount of Damage taken to TriggerTrigger Supported Spells when you take a total of (528-3272) Damage
    Supported Skills deal (-70-6)% more Damage
    This Gem can only Support Skill Gems requiring Level (38-70) or lower
    You cannot Cast Supported Triggerable Spells directly
    This is a Support Gem. It does not grant a bonus to your character, but to skills in sockets connected to it. Place into an item socket connected to a socket containing the Active Skill Gem you wish to augment. Right click to remove from a socket.
  • Resists Chaos
  • Slam (similar to Vaal Slam)

Version history

Version Changes
  • Fixed a bug where Ossecati, Boneshaper was summoning the wrong monsters when taking damage.
  • Introduced to the game.