Ullikummi

Ullikummi (or Ulli as he's commonly called) is a Sky NM that drops the Autumnstone, an item required to pop the sky god Byakko.

As of an early 2007 update, Ullikummi is no longer a lottery spawn. Instead, this NM is now popped by trading a Diorite to the ??? point in his area. Diorite drops from any of the Aura Statues in the Shrine of Ru'Avitau, and from the Enkidu in Ve'Lugannon Palace. Ulli uses Banishga III, Diaga II and Flash black magic attacks.

The Autumnstone is one of two items required to spawn Byakko.

A map showing Ullikummi's spawn point

If you're camping against other groups to get Ullikummi, remember to use the command /blockaid ON. This will prevent others outside your Alliance from attempting to steal hate (and claim) by curing you. Remember, /blockaid will reset to OFF if you die or change areas.