Example 1: Search for an enchantment
Input: “Mending”
Librarian (workstation: Lectern), levels 1–4 as a random enchanted book.
Price: 10–38 emeralds + 1 book (treasure enchantment, so double the price).
Java chance: approx. 1.7% per newly assigned level 1 librarian (40 enchantments in the pool).
