Reincarnation in DxD with wishes

Theo had done what needed to be done. He had shown Joker his place and sent a warning to all criminals. The Joker was now socially and mentally dead. Even living was difficult for him now. Theo didn't need to deal with other criminals—everyone knew who he was. Currently, he was sitting in a café with John Constantine, who looked like he could die at any moment. It seemed John had cancer and was awaiting death, smoking even more yet continuing his exorcism work.

John felt a bit scared sitting in front of Theo. He knew this man and understood what kind of psychopath he was.

John Constantine: "I swear I haven't committed any crimes! I don't even know why you're after me, but you wouldn't beat up a guy with cancer, right??"

Theo laughed: "No, man, don't worry. I just need something from you. If you give it to me, I'll cure your cancer."

(For plot reasons, I made it a special type of cancer, given by God to punish John. Even though John is at low 1-C tier, the cancer keeps him weak.)

John: "Alright, what do you want? It must be important for you to be interested in me. And it seems like you know who I am."

Theo: "At least I know you can take down Superman. Magic must have shortened your life by now. My offer is this: Everything taken from you will be returned. After all, magic comes with a cost. It'll cure your cancer, but in return, you'll willingly open your memories to me."

John stood up, surprised: "Are you insane? Do you think I'll let a psychopath like you mess with my mind? You know what? Screw off!"

John then took out a cross necklace from his neck and said: "In the name of the Father, the Son, and the Holy Spirit, I command you, begone!"

Theo felt the pressure but absorbed all the energy. It seemed like a new power to him, and now he was even closer to obtaining Superman's strength. John stood there, shocked. He used all his spells on Theo, but Theo absorbed every attack, growing stronger with each one. John fell to the ground, and Theo lifted him with one hand. John's hands erupted in flames, engulfing Theo's head in fire, but Theo absorbed it all.

Theo: "Seriously? Why did you use hellfire? That could've destroyed this reality, you idiot."

John raised his hand and said, "I surrender."

Theo punched him, breaking his nose.

John: "Ouch, that hurt."

Theo: "Good. Now, I assume you're accepting the deal?"

John: "Yes."

Without waiting, Theo entered John's mind, observing all his magical knowledge. But what Theo was looking for was something even John had forgotten—Mobius Chair. John knew its location, but God had stopped him, burying the memory deep in his mind. Even John couldn't remember it, but it was exactly what Theo needed. Once Theo sat on the Mobius Chair, no one could stop him. His sealed powers would be unlocked, and his oath fulfilled.

Just as promised, Theo reached into John and burned away all the cancer cells. John's cancer was now gone unless God chose to reapply it. John was restored to his full strength, and the price of magic was lifted. In the DC universe, magic always comes with a cost—whether it's your sanity, life force, or even a limb, depending on the spell.

Now, thanks to Theo, John was free from this price. When he realized this, his face showed pure shock.

Without wasting any more time, Theo used the Speed Force and sat on the Mobius Chair. A wave of realization hit him, and his old form returned. His powers multiplied. Theo was now almost invincible in this universe, at a High 1-A tier. But if he entered another universe, he would reach Tier 0, making anything possible. One final universe and everything would be complete.

(Friends, this will end soon. Since the story is concluding soon, it's your choice. I'm thinking of sending him to the Fate universe and, after that, maybe to the Dark Continent in HXH. It's up to you—write your choice in the comments!)

The entire universe felt the weight of Theo's power. Regular people felt like they had a burden on their shoulders.

Meanwhile, in the Justice League…

Batman had a bad feeling, and Superman felt the same. Wonder Woman, sensing a divine presence, thought it could either be a curse or a blessing. The Green Lanterns sent a message about the rise of a new god, a powerful one. But just as they were about to discuss it, a man appeared before them. His face was unfamiliar, but Batman felt like he knew this person.

Theo POV:

I find the entire Justice League sitting and planning their next moves. I teleport in front of them. Flash immediately stops in front of me, inspecting me, but I slap him at a speed even he can't match, sending him flying.

Just as Superman was about to attack, I raised my hand and smiled: "It's me, Tatsuya."

Batman was shocked: "Tatsuya? Why do you look different, and why is your hair red?"

Theo: "Yes, I've become a god. This is my true form. It's not important. What's the status of Darkseid and Brainiac?"

Everyone accepted it, and just as Wonder Woman was about to question me, I extended my hand, pulling her toward me and choking her.

Theo: "Don't you dare question me, woman. Foolish Amazons never learn."

Wonder Woman was shocked that I knew her move before she even made it.

Theo: "Now, friends, I ask one thing of you: don't participate in the battle because it will be brutal. Just protect the civilians. Believe me, aside from Superman and Wonder Woman, the rest of you will only get in my way. Batman, no offense, but this is no ordinary Darkseid. This is the ultimate form, and it far surpasses the multiverse. He has split himself and sent parts into every universe. The Darkseid you fought before was a small fragment. Now, the real Darkseid is coming, so prepare for casualties. And Brainiac? He's as good as dead, but Darkseid will be tough."

Everyone was shocked by the reality. Aquaman was questioning his life choices; Martian Manhunter had suspected it, and the Green Lanterns remained silent, observing. Theo not asking for help meant he believed he could handle it alone.

Then, to lighten the mood, Theo cracked a joke: "Hey Aquaman, Mr. Sparrow told us you sleep with fish. Is that true?"

Aquaman stood up: "Who said that? That's a lie!"

Flash: "Is it a lie? I thought it was true. It's even on Twitter."

Aquaman, embarrassed, sat back down, thinking of finding this Mr. Sparrow and feeding him to sharks.

A week passed, and the Justice League got used to Theo. After all, he was charming, though they remained cautious. Suddenly, an alien spaceship appeared over the Earth, and an army of aliens and robots descended.

Now that Theo had gained his full powers, he also had access to shadow forces. From his inventory, he summoned shadow soldiers, including Surtur, Hela, Thor, Odin, and the Avengers. All gathered around Theo. The Justice League watched in awe. Theo had summoned more people than the alien army, and his soldiers looked terrifying. Without saying a word, Theo dashed toward Darkseid, punching him with full force, sending him flying, causing a mountain to explode in the background.

Brainiac extended his tentacles fast, but in a flash, Shadow Odin severed them. Yet, the tentacles regenerated. Shadow Odin kept attacking Brainiac, and Superman joined, punching Brainiac high into the air. Green Lantern was clearing out the enemy armies with help from the other Lanterns. Theo's shadow soldiers and the Justice League fought fiercely against Darkseid's and Brainiac's forces.

Darkseid reappeared in front of Theo, trying to punch him, but Theo dodged and kicked Darkseid behind the knee. However, Darkseid didn't fall. Instead, he caught Theo's leg and snapped it, but Theo quickly healed and charged at Darkseid's head with full power. Darkseid blocked, then fired beams from his eyes, hitting Theo and causing his right arm to disintegrate. But Theo's arm reappeared, and he looked into Darkseid's death lines with his eyes, seeing the exact spot to strike.

Chains of heaven appeared behind Theo, aiming to strike Darkseid's death lines. The more Darkseid tried to escape, the more he got trapped. Realizing the danger, Darkseid fought back, but one of the chains cut his hand, paralyzing it. Darkseid had to sever his hand to escape. But he had forgotten one thing—Theo. In an instant, Theo appeared behind him, reaching into Darkseid's chest and absorbing his power. Knowing he would die, Darkseid decided to go all out, overloading himself with energy.

Suddenly, Darkseid unleashed the Anti-Life Equation, beginning to disintegrate Theo, but Theo's rapid regeneration held up. Darkseid detonated himself, but Theo absorbed all the energy, though the space around them began to crack like a mirror. Theo telekinetically pulled Brainiac toward him.

Suddenly, he flew towards Theo, but Theo swiftly covered his hand with the Anti-Life power and broke Brainiac's neck. In an instant, Brainiac was consumed.

Now, only his armies remained. Metropolis had turned into a battlefield, but Batman had saved most of the civilians. Superman's cousin had also arrived, and Wonder Woman and everyone else were fighting with all their might. Yet, it seemed as if their enemies were endless, coming wave after wave.

Theo didn't wait. He made a gesture with his hand—one he hadn't used in a long time.

(I last used this move during the Heian period)

"Let the sky tear apart, let sins be weighed. Let the earth tremble with justice. Domain Expansion: Divine Punishment."

And the entire area turned into a hellfire. All the enemies began to burn alive, and as they died, they transformed into shadow soldiers. When all of them were gone, nothing remained but ruins. With a simple wave of his hand, Theo restored all the buildings, making them brand new again, and all those who had died were brought back to life. Everyone watching from the sidelines collapsed to the ground in awe.

Justice League: "This is the power of a god."

All the people began to applaud Theo, but he said nothing. He turned to the Justice League.

Theo: "I'm leaving. I've completed my oath. The world is in your hands now. See you."

And with that, Theo vanished. The DC universe had come to an end, and Theo found himself in the void. 

It was time to move on to a new universe.

*(Don't forget to send the Power Stone and comment which universe he should go to next!)*