Synopsis

"So you are saying you are a goddess?""yes, I am the goddess of spirits!""And I am your son?""yeah! That is it pretty much,""And you chose me as one of four heroes to save a fantasy world that I belong to from a cosmic monster, is this another trash isekai story?!""You seem to act like you know what will happen, so here is a portal to that world, I will give you an extreme amount of magic and the ability to copy any spell!""Oh, so I will be overpowered then! well, why not? what is the worst thing that could happen?"The MC got his heart stabbed twice, was recruited by a biological weapon, chased by the demon princess, fought a herd of undead alone, and got chased by the strongest entities in the world in his first week of arrival.