The sin of Insanity

A god is bored, which can be very very bad for any race but for a particular human, this might be his saving grace. Walter always had shitty luck in his life yet the moment he died he got a 'lucky' break and has gotten the possibility of achieving the dream that a lot of otakus dream about. But it's not all sunshine and rainbows, Walter is also gonna need this luck of his to be good on the other side if he wants to have a fighting chance in the next world. With the powers of 3 different anime worlds, he will get thrown into the crazy world of the Seven Deadly Sins into the body of an adult. But in order to make himself more powerfull, Walter sacrificed the memories of his current body but not his past ones. Now with powers from different animes and absolutely no memory of the past few decades he has to survive in the dangerous world of The Seven Deadly Sins, what could go wrong?!