The siren bell (bonus) (Patreon)

Percy finds himself in a great bunker fashioned like a high class vintage mansion as he is on quest to retrieve one of Typhon's ancient treasures, only the lord of the mansion seems to already know the effects of the treasure.

Even before he meets the lord, he hears the mind numbing ring and instantly falls under the lord's power. Who takes advantage of the demigod's milk for his tea.