Source

Moogle Treasure Trove Event 

Item

Uolon Horn

Description

Summon forth your uolon, a great big beast that tends the forest with a great big grin.

Journal

This enormous beastkin native to the temperate forests of eastern Yok Tural is believed to be closely related to trolls and yetis. Possessed of exceptional intelligence, it has been observed accelerating plant growth by way of peculiar dances and aetheric emissions, a behavior that has earned it the attention of scholars.

Tooltip

I'd have to recommend an uolon bristle hairbrush.
   - Vapli