Who Am I?

Are you curious about history’s mystery? Well I’m going to tell you everything I could remember.
But first, let me introduce myself…
My name was always changing, but they usually call me ‘Şayeste’
And i was a mystic Turkish muse,
I was alive about 1215 years,
I saw Turks rising,
I saw rising states,
I saw wars,
I saw many death,
When there was intensive feelings that ready to burst,
I was there to help.
If there was writing a story,
I was there to help.
And if there was a murder of a psychopath
I was there to help…
People usually love me and they think I am a good, innocent creature.
But they don’t know that I’m the monster’s adviser…