1 I am born with cheat system

My name is Alex and I am human , so I happen to be dead. Your are telling me why was I able to talk even I was dead ?.Well, first thing I don't know and second thing there is a person in front of me floating in the air and calling himself god are something like that . He is saying that he got a mission for me and granted any power of my liking . he has given me the choice to choose powers like superhuman strength and speed , mastery over the basic elements like fire , water , etc..,legendary weapons and S class battle attributes and finally new power that I can create .

The mission is to stop a war caused by an evil organisation by the name cursed sins led by seven people of different races and each one of them is exceptionally strong