XLII's Metronomicon Key

 is a key.

Obtaining

 * Made by a Handyman (Lv 100) from
 * 1 Aspen
 * 1 Frosteez
 * 1 Obsidian
 * 1 Altdemon Hair
 * 1 Thriten Tooth
 * 1 Twentoo Skin
 * 1 Thirtree Loincloth
 * 1 Sethen Beard

Uses

 * Access
 * XLII's Metronomicon