The Toa and Ekimu chase the Destroyer across Okoto, trying to undo the damage he has done as he travels. They catch him at the shores of Black Bay, using the combined power of the elements to raise the legendary Black Volcano. It is here that we first see the massive doors that lead to the underworld...and the tomb of Makuta. As the Toa attack the Destroyer, he holds them off while trying to force open enormous doors. All the power of the elements and the evil intentions of Makuta are funneled through the Destroyer. And as the battle rages on, the Toa realize that the creature is not just physically powerful, he has unparalleled abilities to corrupt that which is good. So that Toa must be constantly on their guard as they try to keep him from opening the doors to the underworld. The pivotal moment comes when the Toa must trust...in themselves, in the creatures and in the elements they command. Then, by focusing their power, they are able to subdue the creature just as he opens the door. Now, with the door open enough to admit Ekimu, the Mask Maker sacrifices himself by entering the underworld as the Toa knock the mask of control from the face of the Destroyer. The doors slam shut. But Ekimu is inside. The helpless Hunter, without a mask of power, is left to the mercy of the Toa. But the doors are shut...and should remain that way forever. But what matters to the Toa is Ekimu...alone inside Makuta's tomb. The world is safe. But the Toa's mentor is in danger. And while it would be best to remember him as a hero and move on...the Toa aren't sure they can just turn their make backs on someone who gave them so much. When they return to Ekimu's forge, they find new armor waiting for them. Forged from bits of the Mask of Ultimate power, Ekimu has left the armor for the Toa so they may take his place as the protectors of the people of Okoto. But then again, with armor like this...they could venture into the underworld to save Ekimu and finally put an end to Makuta. But that's another story.