Proto I proves to be too strong for Ban, Hiro, and Ran to handle. However Professor Yamano notices Proto I still has a problem with overheating. Ban proposes the merge to form Sigma Orbis, but Professor Yamano tells him to wait until they have only around 10% power remaining. If they can cause Proto I to overheat, they have a chance of beating him with Sigma Orbis. Minerva gets severely damaged, but Ban and Hiro use Elysion and Perseus to distract Proto I until it's time to merge. With only 10% power remaining, the group merges into Sigma Orbis...