Asce
Hey author sama kun senpai ~ when u reach the ending the 2nd last arc of the manna (the current chapter ) u can make a multi verse travel story where in a alternate timeline he makes a portal into the multiverse have him obey the laws of the universe and put heavy restrictions on him that's make things real interesting as he has to start from step 1 again this time there are proper rules for space magic and isn't something vast