Thiassi the Lightning Bringer

Thiassi the Lightning Bringer is the brother of the king of storm giants, Gymer. After his conversion into an undead flesh giant, he lured his brother into a trap.

Antiok, grand necrolord of the Scourge, rides upon his shoulder.

Trivia

 * He is a reference to, a giant from Norse mythology who tried to trick the gods by stealing their apples of youth. He was killed and threw his eyes to sky, where they became stars.