Split-imagination

you're at home living you're daily life when one day, after a pandemic has started to die down, you start hearing whispers in the back of your mind, talking about dimensions merging and how you should go about preparing yourself. Strange things start happening as the world around you starts shifting and changing. Strange races and creatures appear, new landmarks arise, habitats and ecosystems change drastically, even your own being and very soul may go through a change as well. It's up to you how you interact with the new world and whether or not you survive it.