This Ancient Manuscript bind the person of "Fiend" to whoever completes its ritual.

"Et surgere in sanguine, non in morte oriri.
Et ducit insania sequitur me.
Ardentes in manibus oculos obscuro
Dimisit ego ad te pe fende"

(I.E. "In blood I wake, in death I rise.
Madness follows and leads to me.
In burning hands, in darkened eyes
I am released to you, the fiend")

Used as an arcane focus*

Notes: Utility, Cursed