Doryu collapsed on the ground in a pool of his own blood that continued to grow larger. Meliodas immediately jumped back as a wave of darkness surrounded Doryu and the black sword went flying by Meliodas' head towards Doryu.
Doryu's dislodged arm holding the sword reattached itself to his body and his nearly bisected abdomen began healing at a fast rate.
"That power you possess...WHAT THE HELL ARE YOU?!" Doryu shouted out angrily. He charged at Meliodas once again, only for Meliodas to vanish from his sight and reappear behind him with his blade drawn.
Parts of Doryu's body split open, only to close back together immediately as his wounds healed.
'His healing is practically instantaneous. It's almost like Ban's regeneration…' Meliodas thought to himself. 'Not only that but his power is growing steadily despite the damage I've been inflicting on him.'
Doryu lunged forward again at Meliodas and swung his blade downward at Meliodas. Meliodas jumped back, dodging the swing as Doryu's blade hit the ground, forming a huge crater. The force of the swing created a deep line in the ground that reached towards Meliodas. Meliodas felt a sharp pain hit his right shoulder as blood gushed from it. Darkness began to leak out of Meliodas' wound, closing it shut as Meliodas landed on the ground again.
"Y-you...you can heal as well?!" Doryu questioned. Meliodas remained silent as his own healing wasn't truly "healing" and would eventually hit its limit. Meliodas raised Mel Force out to his side.
"Enchant: Hellblaze."
Meliodas leaped forward at Doryu with blinding speed, cutting diagonally across Doryu's body with Mel Force clad in black flames. Blood gushed out of Doryu's body and he screamed in pain.
"This burning sensation?!" Doryu grunted as he took a few steps back. He looked at his wound, alarmed as it wasn't healing. 'What the hell are those black flames?! My wound isn't healing itself?!'
'Even with the enchantment, that cut was more shallow than the last ones...his power and durability are growing faster than I thought. I have to finish him soon!'
With Mel Force still clad in hellblaze he swung his sword forward, unleashing a large wave of hellblaze at Doryu.
Doryu attempted to move out of the way, but stopped as he felt the pain of his last wound was too unbearable. 'Why the hell isn't it healed yet?!' Doryu panicked as he watched the wave of flames coming at him.
The wave of hellblaze engulfed Doryu. Doryu screamed as he felt his body being burnt to a crisp. 'These flames...they possess both the attributes of darkness and fire yet can also get rid of my healing?!'
Doryu's roasted body remained still as he continued burning. Meliodas jumped towards Doryu to finish him off but stopped in his tracks as he felt Doryu's magical power surge even higher.
The black blade Doryu was holding suddenly grew more tendrils that injected themselves into Doryu's chest. Doryu looked down at the blade at what was happening.
"T-This blade...is trying to devour me to sustain its power?!" Doryu questioned. "But I won't let you take my soul so easily!"
Doryu yelled as a black magical dome surrounded him. Meliodas leaped towards the dome and slashed at it. To his surprise, his blade bounced right off. Meliodas took a few steps back and patiently observed the dome. Inside, he could feel something dark and powerful.
Suddenly the dome dispersed. Meliodas' eyes widened and he immediately stepped to the right. He felt a sharp pain on his left shoulder as his left arm was cut off.
Meliodas furrowed his brow as he looked at what Doryu had become. His eyes were lifeless and his sclera had turned pitch black. The black veins on his body had become more noticeable and were throbbing. The sword Doryu was holding continued to leak dark magical power.
"AAAAAGGGHHHH!" Doryu screamed, releasing a sinister aura.
'That sword took over his body and is draining his soul. Doryu's still trying to fight it but he's losing control.' Meliodas thought.
Meliodas pointed his left shoulder towards where his arm was dislodged. A stream of darkness flowed out from his shoulder towards his arm and attached itself, bringing his arm back to his body.
With his arm and Mel Force back in his possession he charged at Doryu. Doryu immediately swung his blade down at Meliodas, creating a huge shockwave of dark magical power at Meliodas.
"Full Counter!"
Meliodas swung his sword at the shockwave, sending it back at Doryu. The shockwave collided with Doryu, creating a large explosion of dark magical energy. Doryu emerged from the shockwave with minor wounds and slashed down at Meliodas. Meliodas parried the blow to the side, creating a shockwave that caused the ground to shatter and the ground to that side to break. Meliodas jumped backwards, his sword clad in black flames again.
"Divine Slayer!"
Meliodas sent a large wave of black flames towards Doryu once again. Doryu continued to charge forward, ignoring the searing pain as his body was burnt and he emerged in front of Meliodas.
'This boost in power...he's gone completely berserk! And his power keeps on rising.' Meliodas thought as Doryu grabbed him by the face. Meliodas unleashed a flurry of slashes at Doryu's arm, causing blood to gush out of the wounds. Despite this, Doryu would not let go of Meliodas' face.
Doryu stabbed the black sword straight into Meliodas' chest. Meliodas coughed up blood as the sword emerged out of the other side of his body. With all of his strength, he kicked Doryu backwards, sending him flying as the sword left his body.
Meliodas collapsed onto the ground as Doryu skidded across the field. Meliodas slowly got back up, darkness leaking out of his chest as his wound closed. He wiped the blood from his mouth and looked at Doryu who was standing back up again.
'His power already exceeds mine. And his resistances keep increasing, especially to darkness. I have to end this now…' Meliodas thought. Meliodas took a deep breath in and exhaled. A dark aura was emitted from Meliodas' body before vanishing completely and Meliodas' demonic features returned back to normal.
Doryu lunged forward again at Meliodas and slashed down at Meliodas. Blood gushed out of Meliodas' body as the blade cut across him.
Meliodas retaliated with a punch to Doryu's body, staggering him and allowing Meliodas to deliver an uppercut to his face, sending him into the air.
Doryu quickly regained himself, using his left hand to punch down hard on Meliodas' head, sending him straight into the ground. The ground cracked, forming a crater as Meliodas' body was lodged into the Earth.
Doryu walked up to Meliodas, picking him up by the head and squeezing him hard. Meliodas grunted in pain as Doryu tightened his grip.
"AAAAARRRGHHH!!!" Doryu screamed as he raised his black blade to slash at Meliodas once again.
Meliodas, still holding Mel Force, quickly cut through the wounded spot on Doryu's arm, causing Doryu to let go of Meliodas. Doryu let out a feral scream once more before kicking Meliodas in the chest. Meliodas' eyes widened as he coughed up blood before being sent flying across the field.
Suddenly, Doryu vanished from sight, reappearing behind Meliodas as Meliodas was still flying through the air. Doryu delivered a punch down onto Meliodas' stomach, causing Meliodas to cough up more blood as he crashed into the ground.
Doryu raised his blade up and Meliodas quickly adjusted his body as Doryu slashed down at him, with Meliodas' right arm being cut off in the process.
Meliodas rolled back several meters before landing on his feet. Heavily bruised and bleeding, he shakily stood up and gripped his sword tightly in his left hand.
"I think...this is enough…" Meliodas said quietly as he coughed up more blood. Doryu lunged forward at Meliodas, with his blade out in front of him, skewering Meliodas through the chest. Meliodas coughed up more blood as his body went limp.
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