Guide To Becoming Overpowered With A Fusing system

Wow.



I guess... it's time for me to get overpowered?



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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!