WBY: Gremlin

Gremlins are tiny fey that resemble diminutive wilden with huge, toothy mouths and a penchant for destruction. These miniature delinquents delight in dissecting complex objects, though no care is given to being able to put them back together afterwards. Suits of armour, automatons, locked doors - if it's made to move without magic, a gremlin wants to take it apart and maybe eat some of the components. Enterprising spellcasters have found rituals to bind small troupes of gremlins into service as familiars, though only the most dedicated anarchist would want to be in the company of these creatures for an extended period.