Monster Tamer NPCs allow converting [n] or [all] applicable items.
Description
Monster Tamer NPCs currently require navigating a menu and several textboxes for every item converted. They should receive an option to convert all applicable items or enter a number for how many you wish to convert.
Rationale
Converting all items at once is a simple quality of life improvement, in line with the options offered by other NPCs (upgrader, quivers, etc).
Additional Information
Monster Tamer exists in Izlude, Alberta and Aldebaran, to my knowledge.