Wrath of a Dark Brother

From the darkness he comes,
Bearing hate and rage
To bring the fiery will of justice on the oppressors
Himself suffering loss.
The pain, visible in his eye,
Unblinking, unwavering Making the oppressors die
A signet of destruction,
burning on his chest,
The sword level in his grip,
The malice flowing through his viens,
Over-eager rancor festers in the blade.
As he broke through the chamber wall,
He never thought twice about what he must do.
As his blade seperated the living from their coil,
The room was painted crimson and black,
Sating his weapon in the blood of the oppressors.
What reason did he do this?
For what reason was there for bloodshed?
Only his sister was worth that price.
Trapped by the oppressors,
They care not for her sake.
Judgement hast spoken,
And the Executioner hast come.