Thiassi or Thiazi

Thiassi or Thiazi is the giant ice of Olvaldi or Alvaldi. He has brothers, Idi and Gang. He has the power of change to be an eagle and has one daughter, Skadi. His father is very rich and live in Thryeim. After his father death, the land is divided into three parts for three brothers.

Thiassi kidnapped Iduna,

Thiassi --with helping from Loki-- kidnapped Iduna, ageless apple guard and her apples of eternal youth. In the form of an eagle, he carried off Loki and kept him dangling from a staff with which he had struck the bird until he promised to get for Thiassi the two things he wanted most. Loki tricked Iduna into going outside the borders of Asgard with a bowl of apples and she was immediately abducted by Thiassi. She refused to let him eat any of the apples and when the gods found out what had happened, they ordered Loki to get Iduna back meanwhile Thiassi hunting down Loki until Asgar with form a giant eagle. But he murdered by the gods of Aeisr when through the Asgard wall.

After that,

Odin takes Thiassi's eyes and throwing in the sky. And then the eyes is to be two stars. Skadi is going to avenge his father's death but the Gods make an appointment. Do you know what the appointment? Let's check THIS!