Surprised Expression → Concentrating on a Magical Spell

I think and I focus. Concentrate. I'm concentrating. Gathering magic, analyzing magic. Focusing on the spell. 'Concentrating on a magical spell.' I feel the magic seize and flex and barely a mo---

--ment to see what happened. It's fortunate I was in the midst of examining the artifact when it activated: frozen as I am, my spell remains active and grants me insight into the workings which have trapped me. Although, perhaps 'trapped' is not quite the correct word. I can escape, but the function of the device occludes me from demanding such so long as its true face is directed away from me.

In the meantime, without a proper wielder directing the magic, it will continue to read my mind. Then, based upon what it finds in my thoughts which most resembles - or contradicts - its arbitrary criteria, it will twist and shift me accordingly until the difference is reconciled.

Which is to say: if I lose focus, it could easily take any stray thought and make it reality.

I... I may not be prepared for this trial. But I am the one facing it all the same. I must cast these doubts aside, or 'I' will cease to be 'me...' but... would that be so bad? I could twist into something horrific and obscene, but if I can keep focused, could I not become... a 'better' me, instead?

It is a dreadful thought, which all who love me would surely chastise me for - even Arma - but it is beautiful thought as well. Like a siren's song, luring a sailor into deep waters, I cannot quite put it out of my mind. I...

(princess' sister, wavy light-green hair, powerful magical robes, princess' dress, concentrating on a magical spell, medium breasts, tiara, stockings, modest skirt, standing in a castle bedroom)