The protagonist opens her eyes to find out she's been reborn as a spider. Which is already nightmare mode, before having to worry about cannibalism from other spiders, not the least of which being her mother! The story of a high school girl with  nerves of steel and her struggle to survive in another world begins here!
but I don't have a clue how to 
use this Heretic Magic, either.
لكن لا أفقه شيئاً عن كيفيّة استخدام
هذا السّحر الهرطقيّ أيضاً
aber ich habe keinen Schimmer,
wie ich diese Ketzermagie wirken kann.
je sais pas comment l’utiliser, moi,
cette magie démoniaque.
mas não faço ideia de como se usa
 essa "Magia Herege" também.
Как использовать 
«Еретическую магию», я тоже не знаю.