ADVANCED BOSS GUIDES

Rex Matriarchs — Osseous Basic

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Combat Modernization. Some guides predate Combat Modernization. Rotations may need review.

Content status

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General Information

⬥ Osseous has 350,000 LP, across a single fight phase.

⬥ Osseous is immune to Ranged, Melee and Magic damage.

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Other guides: Rex Matriarchs guides AFK Osseous

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Gear, Relics and Familiars

Example Preset necromancy

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Fight Mechanics

Avoid using Darkness darkness at Osseous as it will often negate your defensive abilities, for example using res on a big hit to heal you may not work.

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Attack Rotation

2x auto → 1x range → 1x auto → Minion Summon →

3x auto → 1x Minion Launch → 2x auto > Osseous’ Roar →

2x auto → Munch > 1x auto →

Repeat

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Auto Attacks

Mechanic: Osseous attacks primarily with Necromancy damage, with some Ranged attacks.

Solution:

⬥ If camping prayers, use a Necromancy protection prayer (deflectnecromancy / protectfromnecro)

⬥ Pray soulsplit once you are comfortable surviving mechanics

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Minion Summon (Example)

Mechanic: Osseous slams the ground, dealing heavy melee damage and summoning baby skeletons that can heal her.

Solution:

⬥ Use res to heal from the melee hit

⬥ If Resonance is unavailable, pray protectfrommelee or deflectmelee and use devo

⬥ Alternatively, reflect can be used to reduce damage

⬥ Ignore the skeletons initially and prepare for the next mechanic

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Minion Launch (Example)

Mechanic: Osseous throws minions at you, stunning you and spawning additional skeletons.

Solution:

⬥ Stay targeted on Osseous

⬥ Clear the skeletons using any of these approaches:

‎ ‎ ‎ ‎• threadsoffate → volleyofsouls / fingerofdeath

‎ ‎ ‎ ‎• commandzombie (after the stun)

‎ ‎ ‎ ‎• Three casts of spectralscythe

⬥ Target and kill any remaining skeletons to prevent explosion damage

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Osseous’ Roar (Example)

Mechanic: You are pulled into melee distance and bound in place.

Solution:

⬥ Ensure all skeletons are cleared before this mechanic

⬥ Prepare defensives if damage overlaps with other mechanics

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Munch (Example)

Mechanic: Osseous binds you and prepares a high-damage bite attack.

Solution:

⬥ Deal damage to fill the bar above Osseous

⬥ Use any damage-negating defensive, like res, disrupt or divert to completely block

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Helpful videos

⬥ Example kill

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Source record

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