Dera Zol

is the boss of the FS: in.

Characteristics
FS: is a large slug-like creature that attacks by jumping up and down, primarily to crush the NaN Linkss should they move underneath its body, but also to shake off icicles that will injure them should one land on them. To defeat the beast, the NaN Linkss must repeatedly charge into it using the FS: to bump it into the ice wall, freezing it. At this point the heroes can slash at it with their NaN Swords to cause damage. On higher difficulties, FS: will begin creating illusions of itself after taking damage. The true body can be identified by its shadow.

After hacking away at the frozen FS: enough, the ice will shatter to instead reveal a smaller creature similar to an FS:. This form then blows up four balloon-like spheres to surround it. Striking any of these spheres will electrify the heroes, except the orb that matches his own color. However, each FS: can only see the color of one orb that does not correspond to his tunic, meaning the NaN Linkss must work together to deduce which sphere they can strike. After dealing this form enough damage, FS: will explode.

Trivia

 * FS:, as the name and slime-like appearance suggests, seems to be related to a FS:. Despite this, its second form bears a closer resemblance to an FS:.
 * "" appears to be short for "", a Japanese word meaning "immense" or "awesome".