Use the Charred Branch within the Inferno to summon . Kill him and take the Black Heart of Thol'embaar.
Now you will use our newfound knowledge to pull Thol'embaar into the mortal plane like a babe screaming from the womb. Then you will crush him.
The ritual is simple: take this charred branch, tap it on the ground three times, and utter his name aloud.
You must call him from within the heart of the Inferno. Destroy him, and bring his black heart to me.
Tell me! Have you fought Thol'embaar yet?
I am living vicariously through you, <race>. Do not disappoint!
There it is! Such a trophy! Born in the fires of another plane...
Go ahead, <race>. Crush it. Crush his charcoal heart in your hands and let the winds scatter the ashes... yes, yes.
On using the branch:
- Thol'embaar says: Fool of a mortal. Flesh burns.
- Thol'embaar says: Others will come... the age of mortals... has passed.
- The dark ashes swirl around Tyrus Blackhorn, who utters an incantation:
- Tyrus Blackhorn says: Ashes from the plane below, scattered by the hand of foe...
- Tyrus Blackhorn says: Gods of terror, quake and thunder, tear these mortal lands asunder!
- Tyrus Blackhorn barks a cruel laugh.
- Blackhorn shatters his bonds, standing freely!
- Tyrus Blackhorn says: Thank you, <race>! Your heroism in the Inferno has made my escape possible.
- Tyrus Blackhorn says: As a reward, I will allow you to live.
- Tyrus Blackhorn says: But your time will coon soon enough. Yes, <race>. Soon enough...
- Blackhorn teleports away.
-  (optional)
- Complete all of:
Patch 4.0.3 (15-Nov-2010): Added