The easy answer is for the SoA to not actually destroy everything but be a gateway to the plane of Limbo/Pandemonium/"wacky demi plane". Where they have to find/fight the McGuffen to get back, all while the reaper chases them around causing problems.
The easy answer is for the SoA to not actually destroy everything but be a gateway to the plane of Limbo/Pandemonium/"wacky demi plane". Where they have to find/fight the McGuffen to get back, all while the reaper chases them around causing problems.