Obsidian Sanctum (25) Boss Guides - Wrath Classic (WOTLK)

Tenebron

Summary

Face Tenebron away from the raid because of
Shadow Breath
.
Move out of
Shadow Fissure
.
DPS can take the Portal and kill as many eggs as they can to prevent whelps from spawning, or you can ignore the portal and AoE down all the whelps once they spawn.

Shadron

Summary

Face Shadron away from the raid because of
Shadow Breath
.
Move out of
Shadow Fissure
.
Once the Portal spawns, send all DPS, an off tank, and a few healers and kill the Acolyte of Shadron.
The Acolyte of Shadron will increase Shadow damage done by Shadron by 50% and make Shadron immune to damage.

Vesperon

Summary

Face Vesperon away from the raid because of
Shadow Breath
.
Move out of
Shadow Fissure
.
Once the Portal spawns, send all DPS, an off tank, and a few healers and kill the Acolyte of Vesperon.
The Acolyte of Vesperon will cast
Twilight Torment
on the raid and increase Fire and Shadow damage taken by 75%.

Sartharion

Summary

Face Sartharion away from the raid because of
Cleave
and
Fire Breath
.
Don't stand directly behind Sartharion because of
Tail Lash
.
The raid must stay on the main platform for the entire encounter.
Tank Sartharion facing the North side of the platform. The Lava Waves should be spawning behind and in front of him.
Avoid the Lava Waves by moving to the gaps in them.
Fire Elementals will spawn that need to be off tanked. If they are hit by Lava Waves they will enrage dealing 400% more damage.

Sartharion 3 Drakes

Summary

Tenebron will land 30 seconds into the encounter on the West side of the platform and has an aura called
Power of Tenebron
.
Shadron will land 75 seconds into the encounter on the South side of the platform and has an aura called
Power of Shadron
.
Vesperon will land 120 seconds into the encounter on the North side of the platform and has an aura called
Power of Vesperon
.
Sartharion and the 3 Drakes will maintain all of their abilities from their solo encounters, but will also gain the buff
Will of Sartharion
, and Sartharion will gain
Twilight Revenge
.
The Acolyte of Shadron behaves differently and will increase Fire damage done by Sartharion by 50% and make him immune to damage.
Main tank will be on Sartharion the entire fight.
You will need at least 2 off tanks, one for picking up the Drakes, and another for picking up the Fire Elementals and the Whelps that spawn from Tenebron's Portal.
The off tank should move Tenebron to where Shadron will land so they can pick him up quickly. Your goal should be to kill Tenebron before or shortly after Shadron lands.
Ignore Tenebron's Portal, and AoE down the Fire Elementals and Whelps together.
Once Shadron lands, the main tank will be taking 100% increased damage from
Fire Breath
, so be sure to be alternating tank and healing cooldowns. When Shadron opens his Portal, the Acolyte of Shadron will also increase Sartharion's Fire damage by 50%.
The off tank should move Shadron to where Vesperon will land so they can pick him up quickly.
Once Vesperon opens his portal, the main tank will be taking an additonal 75% more damage from
Fire Breath
, as well as have 25% less max HP from his aura. Sartharion's
Fire Breath
will one shot your tank if you don't use cooldowns properly.
Depending on your DPS and Healers, you can kill Shadron first to remove the 100% increased Fire damage taken, or you can go into the Portal and kill Acolyte of Vesperon to remove the 75% increased Fire and Shadow damage taken as well as get rid of the
Twilight Torment
debuff.
Finish off Vesperon, go back into the Portal and kill the Acolyte of Shadron, then everyone switch to Sartharion.

obsidian sanctum (25) Boss Guides - Wrath Classic (WOTLK)

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