Sköll

Sköll is an Emblem Heartless that is found in Kingdom Hearts III. It is one of the bosses at Arendelle, and is accompanied by its Wolf Head packmates.

Kingdom Hearts III
When Hans attempts to murder Elsa, Anna steps in his way to save her sister while simultaneously succumbing to her frozen curse. The shockwave knocks Hans out and he is consumed by the darkness that had been beguiling him, generating the Sköll to steal Sora and his friends away to a shadowy domain. In its attempt to snuff out the heroes, the Sköll summons its packmates and twice transforms into an enormous, raining sphere of darkness in order to crush them, but Sora and Marshmallow push it back each time. It detonates its dark sphere form in a last ditch effort to wipe them out, but Marshmallow shields the others from the blast and is merely blown back across the lake. Afterward, Sora and his friends wake up back on the lake near Anna and Elsa, with Hans nowhere to be found.

Design
The Sköll is a wolf-like Heartless. Its head, shoulders, and front legs are made out of crystalline ice—its face is opaque white ice, with glowing yellow eyes and a Heartless emblem on its forehead, while its snowflake-shaped shoulders and legs are translucent cyan ice edged with opaque white and surrounded by large icicles resembling bristly fur. The rest of its body is a streaming dark miasma that attenuates into a bushy tail.

The Wolf Heads resemble smaller versions of the Sköll's head, similarly tailed by dark miasma, but lack the Heartless emblem and have the Heartless swirl eyes.

The Sköll's name is a reference to the, monstrous wolf of Norse mythology that is fated to devour the sun during the end of the world, as reflected in the Sköll's "Dark Sun" technique.