I think DnD Isekai game would go bit same ropes as legendary monsters game went; absurd power ups or get absurd powers overall which break all rules in universe with their use. But it leads DnD game breaking down and can cause plot become irrelevant in way as heroes can overcome the plot with sheer cheat alone. One reason why I had been slow on picking up legendary monster game and start it anew or continue run it is to me find solid answer how deal with powers, ignore them and focus more story but same time question even purpose super hard char gen if DnD mechanics do not matter story heavy game :P.<br/><br/>So I sort trapped myself as corner as GM and instead trying break the players with ridicullous boss fights I try think how turn game fun again and engaging and make DnD mechanics do matter some amount (with char and foes alike). While not nerfing the powers too much either.<br/><br/>But then again legendary monsters were OP in DnD stats wise as well, so perhaps isekai DnD game would not crumble so fast if protagonists themselves aren't OP but their power is (so they can easily defeated if defeated when they cannot use their powers to cheat or power has limitation on use and foe exploits it).