The Toa Mahri were fighting the good fight... and losing.
Spurred on by the maddened Barraki, their sea creature armies were attacking in neverending waves, heedless of their own safety. The faster the Toa fought them off with weapons and elemental powers, the faster more appeared. The heroes had rapidly become surrounded. They hovered in the water in a circle, backs to each other, struggling to repel each attack as it came.
Toa Hewkii spotted a school of sharks break off from the rest and head off in pursuit of Matoro. Using his Mask of Gravity, he increased their mass until they slammed into and through the sea floor.
"They're going around us!" shouted Hahli. "We can't stop them all!"
"The Barraki know they just need to tie us down here," Jaller replied, fending off a mob of venom eels. "And if enough of their creatures reach Matoro —"
Hearing the strain in his voice, Hahli glanced over her shoulder at Jaller. The Toa of Fire was glowing white-hot. "What are you doing?" she cried.
"If there's no other chance... no other way... am going nova," Jaller answered. "If Matoro is far enough away, and his pursuers still in range... well, it may buy him a few more seconds."
"You'll kill us all," said Hewkii. "You know that, right?"
"And all of them," added Kongu. "Plus everything else for kios around."
"If Matoro fails, we're all dead anyway," said Jaller. "But you four can go — try to get out of range — I will wait as long as I can. Don't hesitate — go!"
Hahli shook her head. "We have fought together for over 1,000 years, Jaller. We're not going to stop now. And we'll die together if we have to."

Pridak saw the glow around Jaller and knew instantly what was about to happen. "The Toa of Fire!" he shouted to the other Barraki and their assembled armies. "Destroy him — now!"

Downfall, Greg Farshtey