Becoming a Witch's Familiar (Patreon)

Much love to anyone who manages to figure out what fantasy language I used for the incantation!

Here's a transcript as a clue:

Re ajanouha. Ev oui'na ypma du ihtancdyht drec, drah oui'ja vekinat uid dra ehlyhdydeuh ec eh ym prat. Luhknydc! Oui feh so ihtoehk nacbald. E ys ruhacdmo y rika vyh uv vehym vyhdyco dah, ed fyc y lremtruut kysa vun sa, cu ev oui nalukhewa ym prat, oui'na bnupypmo so doba uv bancuh. E femm bnupypmo nabayd drec ahdena cbeam uhla eh aylr ayn, pid E fyhd du syga cina dryd ed ec muhk ahuikr du mycd y luibma sehidac. Drec ec bnupypmo ahuikr. Desa du nabayd.