(No P.O.V.)
Queen Athena, Eric, Flounder, and Sebastian had joined up with Ariel and her sisters who were cornered by Flotsam and Jetsam, then rescued by Aquata and Max. They all sneaked back into the palace, watching out for Urs at every corner while they planned how to get the Trident back, and get rid of Urs for good.
Sebastian and Flounder was the distraction for the mind-controlled guards, and with a few close calls, Urs were alone. Aquata and the others proceeded to ambush him all at once when he was looking the other way. Ariel was close to getting the Trident when the Trident went alight, glowing a nasty green/purple color, and Urs swelled up to be the size of a whale.
He blasted the Trident at most of the sisters, including Prince Thor, immobilizing them immediately, and also got Max in place after he saved Aquata by pushing her harshly to the side. Aquata was upset and horrified, but was pulled by Ariel, joining with Queen Athena, Eric, Sebastian, and Flounder behind the barrier columns.
They were struggling to make various plans on the quick when Eric saw that Urs was almost upon the barrier columns, and saw that Urs was directing the Trident at Queen Athena. Eric, he realized all too fast that Athena wouldn't escape the blast, and Ariel would lose her mother. He remembered King Triton's words, and he knew he has to give his life for Ariel if she'd be safe from Urs.
Thanks to Ariel racing him all those past weeks before, he was adeptly fast like Ariel, and from this, he crashed into Urs, causing him to drop the Trident in shock, and realizing in anger that he lost his weapon, one of his tentacles grabbed Eric, and threw him against one of the columns very hard, enough to render him unconscious.
Ariel silently screamed for Eric as Athena grabbed the Trident seconds before Urs even moved to grab it, and he stared upon a pissed, furious Queen, and he exhaled, realizing that he's done for, crossing the line several times.
Athena's eyes hardened like steel as the Trident glowed red, and she blasted at Urs, transforming him into a pitiful, tiny shrimp, all while breaking the shell, freeing Ariel's voice which returned to its rightful place. Then Athena blasted again, sharpshooting Urs out of Atlantica, in front of his pets who was changing back into mutts, swimming furiously to the surface for much-deserved air, unknowing that Glut, the shark from the shipwreck graveyard saw them, and pardoning the irony, but hungry as a shark, he went for them all, and let's say that he never had such a satisfying meal before.
Ariel went to check on Eric quickly while the mind-controlled guards resumed back to normal, shaking their heads, confused and horrified themselves, with the immobilized princesses becoming free, with Max free and gobsmacked at the kiss that Aquata gave him. The pictures inside Urs' shack shimmered, with golden magic spiriting out the prisoners from the pictures, free and able to go back to their rightful homes, and the cage of the sea king's crown shattered like glass, freeing the crown.
Eric was alright, yet he's having a concussion, but he didn't care at the moment as he was beyond happy that he's actually hearing Ariel speak again, and perhaps he wasn't thinking properly due to the concussion, but he asked Ariel to marry him, and Ariel said yes! Queen Athena gave her blessing much to Ariel's increasing happiness, and to everyone's surprise, the crown of King Triton appeared out of nowhere, and Queen Athena held it, realizing that Urs had it all this time as it was assumed that it had gone missing at the time of Triton's death, never having been found until now.
The next week was spent with Ariel and Eric returning to the surface, explaining to Uncle Grimsby, asking him to join them to live underwater, and to their happiness, Grimsby said yes. After a while, Aquata actually came up with Max, with Max introducing her to Max's parents. And all was possible thanks to the special pendants that Queen Athena had created and chanted with the Trident's magic, able to change the owners to human and back.
The wedding of Princess Ariel and Prince Eric as Queen Athena had titled him to be, it was said to be the most spectacular and incredible wedding in all of Atlantica's history, and everyone was invited, including Max's parents, and Prince Thor who couldn't stop coming back, for he's attracted by Andrina. And everybody was glad and excited to see such a couple getting married.