"Alright... so borderline murder hexes. Got it!" Lilith switched bookshelves and pulled out a black-bound bok. "Though Okawa doesn't like selling spellbooks like this without certification, so you'll have to present your membership to the Society to her in order for you to legally possess it. This one has hexes for... let's see." She flipped through its appendix page.
"Limb paralysis, destruction of the nerves, numbing OF the nerves, widespread paralysis of the body on multiple targets, poisonous fog, and similar spells." Lilith closed the book, looking down at Liza with a serious expression. "I am required to inform you many of these spells are cast at the cost of your own health. Some won't cost anything besides your own physical energy, some will narrow your vision or give you tunnel vision for a small period of time. Constant use will lengthen said symptoms and use of these hexes without any mana or form of energy can cause loss of your senses or, worst case scenario, death."
"These aren't side effects one can negate, but it's a matter of working with the side effects. You don't look the type to take such hih risks, but I must state any side effects regardless. It's usually the nerve manipulation hexes that cause vision problems."
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"Okay." Okawa opened a cabinet and pulled out six boxes of the chocolate frogs and placed them along with the books onto a bag. "There you are."