Black Mark

The two lives are entangled and mixed with grudges. A young boy on earth left an indelible black mark in this chaotic era. When I first came to another world, I showed off my splendor. The monsters gathered together to slay the world. The road to becoming a god is smooth and unrestrained. A lover's injury leads to dominance in troubled times. What have I understood in these two lifetimes? What did you get? What is my pursuit?