Demonic Guardian

"'The mouth is getting too big and there's too much heat coming from it!'""'At this rate, it's going to burn the settlement down!'""What are those sounds coming from the hole? I think something BIG may be approaching!'"- Start of Wave 45 (Sacred Island Impossible Mode)

Overview
The Demonic Guardian is the final boss of impossible mode that is exclusive to the Sacred Island map.

He has 300,000 Health, and moves at a below-average speed.