Amascut is trying to steal the soul of Klenter, a dead high-priest, without Icthlarin preventing her from doing so. She uses the player in the quest Icthlarin's Little Helper by hypnotising them and getting them to steal a canopic jar from the pyramid. Amascut then gets the player to plant an unholy symbol in one of the sarcophagi, allowing her to freely access the pyramid. The player eventually runs into Icthlarin, who releases the player from Amascut's control.
During the quest, the player has several flashbacks of what they were doing while they were under Amascut's influence, and they eventually redeem themselves by returning the canopic jar to where they found it within the pyramid. As the priests are about to finish the ceremony to put Klenter's spirit to rest, the player attempts to warn them about Amascut's arrival, but it is too late and Amascut appears before them.
After Amascut realises she no longer has control over the player, she possesses one of the priests in order to kill them. However, the player defeats the priest, and Amascut goes back to hiding.
It is revealed at the end of the quest that Amascut has already hypnotised another adventurer to do her bidding, causing Sophanem's plague to continue, and that the player was part of an endless cycle of conflict between Amascut and Icthlarin.
She is also discussed shortly in the quest Contact!.
• • • • • • • • •