Mah backstory.

Here it goes
________________________________________________________________________________________________________Decorus the Darkener

After Exodar crashed to Azeroth Decorus woke up at the coast of Darkshore she stood up and started to look if there was any sign of the other draenei, but no. Decorus was all alone in this new land. So she started to wander up to the north in the wilds. There she found a cave hidden behind a waterfall she decided to stay in the cave. In the cave she found an strange sword, she felt the power of the sword from far so she took the sword and she felt the power of the sword coursing throught her body.
A moment after taking up the sword she heard someone coming at the entrace of the cave. She hid behind a rock. They were nagas she never had seen a single one but when she saw them she knew that they were aggressive and they wanted to retrieve the sword for theirselves. She jumped from her hiding place towards the naga and killed it fast, the other naga who were on the other parts of the cave heard the death of their kind and started to look for the killer. Decorus would've rather been hiding from them. But a voice in her head said that they all must be slaughtered and so she did. After she had killed the whole group of nagas she left the cave.

After years of roaming in Kallimdor and killing everything on sight.. She left to the Arctic land of Northrend.
In Northrend she met a group of acolytes. Unfortunately she didnt even attempt to kill them, the voice in her head told her to aid them in anything what they were doing. For years she aided the Cult of the Damned in their operations in slaving the Azeroth. As the blade corrupted Decorus' mind the blade came stronger after every single person killed with it. After a long time, the Lich King appeared to Decorus and instantly Decorus knew that he was the person talking to her in her head. He was the master.. He was the one.. To serve for eternity..
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I hope it was good enough :3