Eiyu no Kage

So...I became a 'Master,' apparently. I have this weird tattoo a floating old man pointed out to me, told me to chant some old-school incantation or something. Now i have nine strangers appear inside my head, and they're my 'Servants' who'll also be my teachers to make me more 'competent' in my prisoner's eyes... I don't know how to react to this. I wonder what they'll teach me?