was created by a cult of Ares led by the priest Kunpaetku to retrieve the
cursed sword Soul Edge by their god's command. Upon finding the blade Astaroth
realized it was incomplete, and allied himself with its host Nightmare
and his minions to harvest living souls necessary to restore the blade.
Planning to steal the blade once it was restored, Astaroth was instead
confronted by a survivor of one of his attacks and slain.
later revived Astaroth, who now had fragments of Soul Edge inside him,
to continue after the Soul Edge. Kunpaetku realized his golem was not behaving
as instructed, and placed a controlling curse on him. Astaroth resisted
and attacked the cult, but in the chaos Kunpaetku escaped and Astaroth
learned he was modeled after a human being, the "White Giant".
and nearly killing the man, Astaroth broke free of Ares's control and his
body cracked and physically transformed. Merged with the fragments of Soul
Edge within him, he now hungered for souls himself and went on a rampage.
He was eventually found by Tira,
who offered him more power in return for his servitude to Nightmare. Astaroth
accepted, with plans to eventually consume their souls and Soul Edge itself
when the time was right.