Fighting For Zeldris

"Meliodas." Isaac said as he faced his uncle with a serious face.

"Yeah I feel it to." Meliodas told him as they stood up. Elizabeth already knew what was going on and followed them out of the tavern. They all flew quickly to where they felt the Demon King and Zeldris' auras merging.

"So you're finally here." The Demon King said as all three of them landed on the lake. They glared at him in silence before Meliodas opened his mouth to speak.

"Give back my brother you bastard." Meliodas told him with malice. Isaac pulled his gloves out of his pocket and slid them on. Merlin had repaired them for him after their battle in Camelot.

"I'll have to decline that demand." The Demon King told them while chuckling. Isaac quickly punched him in the face and sent him bouncing along the water.

"I'll have to decline that answer Grandfather." He told him through gritted teeth. The Demon King stood back up and Meliodas kicked him in his gut. Isaac spun through the air and kicked the Demon King into the air. They both rushed him but he hit the water with magic blocking their vision.

"I wouldn't move if I were you." He told them as the water settled. He had grabbed Elizabeth by her neck from behind.

"You shouldn't have brought this dead weight along." He laughed. They both smirked before Elizabeth laughed at him.

"Arc." Was all she said before the Demon King was surrounded by a white light. She glared at him before she threw him around.

"You shouldn't underestimate her Grandfather." Isaac told him as he crashed to the water.

"Believe me I've been on the receiving end of Bloody Ellie's attacks." Meliodas said with a smirk. The Demon King stood back up laughing.

"It seems you've taken too long. You two shouldn't have held back." He told them as the water cleared. He had regained his youth and they could feel his overwhelming power.

"Zel/Father!" Both Meliodas and Isaac yelled as they felt Zeldris' aura disappear. They both charged him only to be beaten around. They stood back up and rushed him again just to meet the same result.

"What is this power I feel coming this way." The Demon King said as they all turned and faced the five bright lights soaring towards them. The Sins landed in front of them and smiled.

"What do you three think you're doing?" Ban asked them calmly, "Did we really do all that work to bring you back just for you guys to kill yourselves?"

"Good point." Isaac told him as he entered his Hatred form. Meliodas smiled as he released his darkness. They began to fight the Demon King to no resolve before Escanor landed in front of them.

"Escanor!" Meliodas yelled with a smile. Meliodas turned to Gowther quickly.

"Put me into Zeldris' dream state now!" He ordered. Gowther nodded and sent Meliodas in as the Sins distracted the Demon King.

"Let's go Escanor!" Isaac yelled as he charged the Demon King. Escanor followed his lead and all three of them began to trade blows. Both Isaac and Escanor were knocked away from him and he brought his sword down on Isaac. A dark bubble appeared around Isaac and his eyes widened. He knew this magic and he snapped his head to the edge of the lake.

"Hello son." Gelda told him with a calm smile, "Someone also wanted to join the fight."

"Hey Isaac." Derieri said as she walked over to him and helped him up.

"Well if it isn't the vampire bitch that corrupted my son and yet another traitorous demon." The Demon King said as he watched the two women standing next to Isaac. Isaac's shock increased as he watch his mother's head be chopped off after biting the Demon King. Derieri rushed him as he grabbed her by the throat. Isaac jumped up and tried to charge the Demon King but was knocked away by him and bounced along the water.

"No!" Isaac screamed as he watched Derieri be killed. The Demon King laughed maniacally as he saw his grandson's despair.

"Merlin." Isaac said calmly as he looked over his shoulder. She knew what he wanted but it was a huge risk.

"That's too dangerous Isa-" Merlin was cut off by his spiking power level before it quickly lowered. Everyone was shocked by his slowly climbing power level. Even the Demon King was surprised.

"Merlin." He told her again as he tore off what was left of his shirt and she snapped her fingers with a sigh, teleporting four dark orbs above her. The orbs shattered when Isaac pointed his hand at them and four black streaks shot towards him in the blink of an eye.

"What's going on?!" Elizabeth asked Merlin as all of them watched the streaks slam into Isaac and dark energy blocked their view of him.

"That's the rest of his Sacred Treasure." Merlin explained as the energy faded and they saw that he was now covered in armor, "It puts an enormous amount of strain on his body, so I sealed the pieces away."