“Ilythra whispers prices to those she likes and hums faintly whenever a new customer attempts to bargain. She catalogues every spell she's sold in a leather ledger bound to a tiny homunculus that follows the shop; the homunculus sometimes arranges scrolls into odd patterns at night. She refuses to sell scrolls of necromancy past 4th level unless satisfied the buyer is not malicious, and she will offer a 'binding clause'—a verbal contract that adds a small extra fee but guarantees post-sale assistance (scrying to locate a stolen scroll, magical replacement insurance if the scroll is destroyed under specific conditions).”