To kill the Gods

this is a Revenge story about a man who has lived for thousands of years after being tossed away by the God's and is waiting for his chance to get revenge. thousands of years after the gods disappeared the world continued to advance until we reached the modern world when everything changed. dungeons began to appear all over the world those who entered those dungeons gained abilities and systems. while this happened beings who hid for many years began to come out of the shadows and become stronger. A war between Humans, Immortals, and unknown beings who can create these dungeons was beginning. type of story will probably just keep changing throughout the entire time might randomly jump from action to romance to tragedy to adventure Don't expect a super kind MC, He won't protect everyone just because he can