This is the official last phase of the entire co-op fangame. At this point, as described in phase 2, Deus'll no longer offer mercy to Chara. Yeah, there are other occasions that Chara is the protagonist and Frisk as an Antagonist, it's hard to tell who the real villain is, besides everything they have done to him, he won't give up. About halfway through the phase, Deus now goes "fully" all-out against the Demonic Chara. Since it is somewhat a 3d fight for most of the stage, the finishing move will be an Overtale spike stunning them, then a blaster hits them, turning their soul light-blue and unable to move until deactivated. After some dialogue, Deus's soul will appear, as described in the cover, then more dialogue will be present before ending with "PREPARE FOR THE ULTIMATE BAD TIME OF YOUR LIFE" while his eyes are glowing. Then ghost versions of Keith and FrozenOver Sans of Stage 1 Phase 3 will appear right beside them. This scene here is relevant to Disbelief Papyrus Phase 3 in which he summons both Sans and Undyne to fight with him.

This might be the last theme before taking a break; hope you had a good time with this. For this to make sense, check out the description for the previous themes to fully grasp what's going on.

See you next time we upload a new theme. =)