I Hunt and Purge Reincarnators

Inside the throne room of Kel's castle. Kel sat on the throne studying countless profiles with Silvya by his side. Kel wasn't about to jump into a world because it was interesting, he needed to properly think of which world would suit him best.     

The conclusion he came to was to avoid worlds were the reincarnator has already become powerful and the worlds where the reincarnator was till a bit far from starting to cause damage. He decided on this because without gaining some proper abilities and experience, he'd be beaten easily. This led him to look for worlds where the reincarnators were just beginning to pursue their goal. Among these many worlds, one had caught his attention.     

The reincarnator of that world had a ROB who gave him 3 wishes. Which is a blatant lie because the wishes surpassed 3, Kel could only curse his stingy Creator for giving him zero wishes. The reincarnators first wish was to merge multiple world's together. But this in turn created a world at a constant war. Many would die, but he only saw it as an opportunity to be a hero and get girls.     

Kel had always found the idea of being a suicidal hero just to get some utterly stupid. So far Kel judged this reincarnator to either be stupid or just too excited to make such a wish without being specific. ROBS are infamous for the chaos they create after all.     

The second wish was to make one of the op characters loyal to a certain summoner, which he also said would be him once he summoned the legendary figure, shocking the whole kingdom as he claimed he would be a low-key underdog. Kel was already looking forward to slapping some sense into this idiot, but he could only sigh and keep reading for now.     

The third wish was actually also stupid as he had wished to have the appearance of a handsome mysterious figure. On top of that he asked for his cock size to be multiplied. But the excited otaku wasn't specific, so the mischievous ROB multiplied his 3-inch cock by 0.5 and sent him on his way.     

The world he reincarnated into was what Kel began to call a merged world. A world with many worlds bundled into a whole new place. Kel actually liked this as it didn't give the reincarnator the advantage of knowing future events. Meaning he could surpass the reincarnator in power very easily, the system of the reincarnator was based off actions which meant if Kel could interrupt some he would slow the guy's progress down.     

As for the merged world, it was a combination of three worlds. Attack on Titan, Nasuverse and a currently unknown one. The world has been in a state of war with a race humans have come to call demons. In this world all beings had mana, but very few had talent to become proper mages. They were many fields a mage could focus on but the three most common from low to high are creation, augmenting and pure.     

Those from the field of creation were responsible for many of the technological advancements in this mana-driven world. Augmenters made up the military might of many empires. Paired with weapons created by the creation departments, they were a force to be reckoned with. Pure mana holders were few, but extremely power. Unlike what their name implies, they do not hold pure mana. They simply have extremely large mana vessels. Holding up 80 times the mana of regular people, this gave them the ability to create powerful and sometimes devastating spells.     

A/N: Don't mind The BS it's an AU meant for MC is get accustomed with his abilities and the like. Other worlds won't be merged.     

Pure mana holders are sought out by every empire. But even more rare are Seal bearers. Seal bearers are a special even among Pure mana holders for the simple fact they are only ever 7 to 8 in number. Seal bearers were the only ones capable of summoning and forming contracts with Undying spirits. Their name comes from the simple fact that they never die. When defeated they simply vanish until summoned once more. They case of some that roam freely in the vast world. Of course spirits like this are generally weaker as all spirits need a seal bearer to be able to absorb mana. The only other way to gain mana for these types of spirits to steal it from people.     

A seal bearer can form multiple contracts, but the problem lies in mana. Normally a seal bearer can't form multiple contracts because their mana would not be enough to have both spirits fight at full potential. Once someone finds out they bear a seal, they must travel to the main church in order to be given catalysts to summon undying spirits. Most seal bearers were pure mana holders hence they were always allied with or belonged to a large empire. This time around two emerged from the most powerful nation New Babylonia, two also emerged in the second most powerful empire Yggdemillenia. Three however were currently unknown. One obviously being the reincarnator.     

New Babylonia was the most powerful for the simple fact they had the most powerful augment unit, The scouts. Among these scouts some held what people called demon blood which gave them the ability to morph into strange large beings. For a long time these people were shunned and cursed by all nations. It was only until the last generation of seal bearers that the king of New Babylonia who at the time was the most power seal bearer fell in love with the most powerful of the demon blood holders more than 100 years ago allowed them into his nation.     

This proved to be a wise choice as the years flew by the demon blood holders assisted in repelling the Demons.