Riven took the girls to Eraklyon and showed a lot of negativity. Musa was very angry at Riven, and she was glad that she has broken up with Riven. In the Snake Lair, Logan accompanied the Winx. He saw that Bloom had given all she has got, but the snake was still alive. He stepped in front of the Winx in his battle stance, while Musa watched him worriedly. Logan's hair turned yellow and his eyes turned green, and Musa was terrified, "L-Logan, y-your hair! Are you alright?" However, other girls became excited, knowing that Logan will defeat the snake for sure. Musa became confused when she saw other girls were excited instead of worried. "Oh, Musa, I am sorry, I forgot to tell you what happened to Darcy while you were unconscious. Logan turned into this form and Darcy was no match for him. He was just too strong for her. Right now, we can only believe that he has the same power to defeat this snake." As the Winx had believed, Super Saiyan Logan swiftly dodged the snake's strikes. Frustrated, the snake had to use its blast from the mouth, which Super Saiyan Logan used this opportunity to create an opening in the roof.

In the dungeon cells, Riven grab Musa's hand and then turned into an element monster. After Musa had freed herself from the grasp, Super Saiyan Logan stood in front of her to prevent anymore harm. "Run, Musa! I will handle Riven––this monster!" Musa gave Super Saiyan Logan a last look and escaped from Element Monster of Riven. Unlike any battles as before, this battle was a hard fight; the monster was swift and fast as Super Saiyan Logan himself. Bloom caused Valtore to weaken, helping the Winx to defeat the Element Monsters. However, they faced another monster, a monster of Valtore transformed by the Ancestral Witches, which their Convergence attack did not have an effect. Super Saiyan Logan appeared from the dungeon last. "Logan! Help us!" Musa called out. Of all Element Monsters they had faced, Monster Valtore was the strongest, and Super Saiyan Logan was being beaten down badly. Musa tried to run towards him, but Tecna blocked her. "It is too dangerous, Musa. I know you want to help him, but even we can't defeat this monster with our Convergence, we can't do anything except just watch," Tecna apologized. Musa, with tears in her eyes, watch Super Saiyan Logan being tortured by Monster Valtore, and he turned back into his original form. Suddenly, Logan had the upper hand for an instance. He instant transmitted away just when Monster Valtore was about to crush him. "I've got it," Logan whispered. "Got what?" Bloom asked. Logan was so weak that he could not stand straight, and Musa supported him. "Destructo Disc!" Logan held out his palm as if he was holding a tray, but held it high about his head. "Logan, please… Rest…" pleaded Musa, with a concern in her voice. Logan threw the Destructo Disc at Monster Valtore and cut him in half, causing the Monster to roar on top of its lung. "Now!" Logan said, weakly, and blasted two parts of the Monster with all his strength. Afterwards, Logan collapsed, with Musa calling out his name and hugging him tightly, "Logan! Logan! Oh, Logan! Please… Stay with me…" Musa carried Logan in her arms all the way back to Alfea.