I'll Send Arthur's Regards to the Demon King

The two BOSSes, Satan, guarding the door to the Demon King's Chamber, also served as the keys to the mechanism.

Only when the Player used the "cross" to kill both Satans would the doors to the Demon King's Chamber truly open.

If the two Satans were killed with weapons other than the cross, the Player would be forcibly teleported to the fifth stage, the lower level beneath the Demon King's Castle, under the effects of the Cycle Curse. At the same time, every monster unit killed along the way would revive, including Satan's Triplets. For Players who had painstakingly reached the end of the sixth stage, it would be the ultimate torment all over again.

Due to Christianity-related issues, the American version changed the "cross" into "a shield bearing a cross-shaped pattern," but there was essentially no difference.

Although Cheng Tian had previously turned a wyvern into roasted wyvern with a mimicked flaming cross, he remained extremely cautious here. He first retrieved the cross from a hidden area, then controlled the damage and killed the two Satans one by one.

Sure enough, the Cycle Curse was successfully dispelled.

Cheng Tian and Bazett exchanged a glance, then strode into the Demon King's Chamber.

The entire Demon King's Chamber was exceptionally spacious and carried an indescribably plain atmosphere. At the far end, directly opposite the entrance, stood a throne atop a flight of stairs, one that could only be looked up at. Seated upon it was a towering demon with two devil horns and a full ring of purple beard reminiscent of Zhang Fei or Li Kui. He sat boldly, propping his chin up with one hand as he watched Cheng Tian with considerable interest—

Demon King Astaroth.

To the left of his throne stood a Princess with equally long purple hair.