Sköll

Sköll is a Heartless boss in Kingdom Hearts III. A Heartless that rose from the darkness that consumed Hans's heart, it is the final boss of Arendelle.

Kingdom Hearts III
Following Han's succumbing to darkness he transports Sora, Donald Duck, Goofy and Marshmallow into a shadow realm in which he manifests himself into a Heartless. This prompted the quartet to fight the Heartless.

After a long battle, Sköll prepares to use its trump card by transforming into a dark ball of energy to self-destruct itself creating a powerful attack but not before Marshmallow shield himself to protect Sora, Donald and Goofy from the blast.

Design
The Sköll is a wolf-like Heartless. Its face is white, with yellow eyes and a canine teeth, while its bottom is black in coloration that resembles a ghostly apparition. The Heartless insignia is present on its forehead. It is surrounded by blue highlights on its back and two arms emerging from it's body with blue fingertips

The name "" is the name of a monstrous wolf in Norse mythology that is fated to devour the sun during the end of the world.