Guide To Becoming Overpowered With A Fusing system

Wow. I guess... it's time for me to get overpowered? -------------------- For those who are wondering, my name is Mark. Marcus Ranger, to be exact. Although that's the name I adopted after I came into this body, which was known to none as it lived in the forest and died today due to some disease. Now I am inhabiting it. Although this isn't my world, I have all related knowledge in my so-called 'System'. Now, I will begin my plan for World Domination! Wait... World Domination is only the beginning? This System... has too high expectations! Fine! I shall fuse Chimeras and Phoenixes and blow everyone's minds!