Kostchtchie

Kostchtchie, known as the Prince of Wrath, was a demon lord and a patron of frost giants and rage.

Personality
Befitting his title as "Prince of Wrath," Kostchtchie was renowned for his rages. However, he was petulant and childlike in many respects, and these rages often resembled demonic tantrums. Kostchtchie was particularly attached to his massive enchanted warhammer, known as Matalotok.

He was known to be extremely misogynistic.

Activities
Kostchtchie ruled the Iron Wastes, the cold and icy 23rd layer of the Abyss, and had ambitions of conquering other layers as well He was known to train some murderous frost giants in the art of wizardry.

Relationships
By establishing himself as a deity of frost giants, Kostchtchie directly encroached upon the domain of Thrym, though that titan did not take direct action against the demon lord. The dwarven deity Clangeddin Silverbeard considered Kostchtchie, as well as the other evil giant deities, a hated enemy.

Kostchtchie tended to consider most other demons of the Abyss to be his enemies. He was especially known to despise the mavawhan ice demons who had been the original rulers of the Iron Wastes before he assumed control.

Kostchtchie was frequently accompanied by a pair of very large leucrottas as well as a giant white dragon mount of ancient age.

Worship
Kostchtchie was worshiped by frost giants who had turned away from Thrym. This included frost giants who sought power through learning arcane magic. Kostchtchie had a prophet of sorts among the frost giants known as the Frozen One.

Some tanar'ri priests were known to pledge themselves to Kostchtchie's service.

History
Kostchtchie was born as a mortal man, but one who was severely deformed. Spurned by tribes and by women, he was driven to anger and rage. He turned to brutal murder, slaying every woman who ever mocked him and crushing the skull of his former tribe's chieftain with his bare hands.

In time, he was found and mentored by the great witch Baba Yaga. She gave him a set of cursed, nested skulls. Inside the innermost skull—that of a tiny quasit—was hidden a black diamond, and Kostchtchie used dark magic to transfer his soul into this gem, granting himself immortality.

Now unable to be killed, Kostchtchie's body grew both larger and more hideous, until he was the size of a great giant. His tribe grew to the size of a kingdom, and their murderous exploits became infamous and were noticed by powers from other planes of existence. The celestial paragon Gwynharwyf led an army of against his forces, but she was not able to overcome him until she discovered the demonic source of his power. She found and destroyed the skull and its gem, returning his soul to his body so that she could slay him, sending his hateful soul to the Abyss. However, this was only a minor setback for Kostchtchie, whose body was recreated in the Abyss in demonic form.

At some point, Kostchtchie was bestowed the hammer Matalatok by the witch Tasha, which had been originally crafted by Thrym, god of frost giants. Kostchtchie used it to dominate a clan of frost giants and would ultimately declare himself a god to them.

Kostchtchie would gain control of the Iron Wastes by driving out the native mavawhan. From there he antagonized Thrym, such as by capturing and imprisoning his brother, Grjotgard, and proceeded to wage war on other minor demon lords, slaying at least three. It was unclear whether his actions against the forces of Thrym and the Abyss were out of his own ambitions of conquest, or if Tasha was pulling his strings.

Around the, Kostchtchie's hortha was summoned by summoners of Narfell. Frost giants gathered under this hortha and fought on Narfell's side against Raumathar.

Sometime prior to the, Kostchtchie was defeated in combat by the archdevil Zariel, who stole his hammer, the mighty Matalotok, and imprisoned him in a ravine in Avernus that was dubbed Kostchtchie's Maw.

Appearances

 * Adventures
 * Baldur's Gate: Descent into Avernus