Michael was forced to regain his senses quickly. Tending to the burns inflicted by the Purgatory Flames was no problem, but the harm it did to the Living Soul and the connecting links between the Curses, World Serpent, and Michael weren't something that could be mended easily.
A few thousand SoulStar Fragments were consumed immediately, but that wasn't enough to heal everything. It was sufficient to ensure the Living Soul wouldn't sustain permanent damage. Also, Michael had to invest close to 100,000 SoulStar Fragments to reinforce the Soul Sphere.
The Curse hibernating inside him was hard to calm down, but it wasn't on the verge of tearing everything apart after the Soul Sphere had been mended and reinforced.
[Kill that bastard!] The World Serpent commanded, [I can lend you some power. Tear him apart!]