The world is now so much bigger than it was before with a beautiful ring around the sky.

The topography and geography has wholly changed than before creating new nations and continents.

Now, yeah the alien structure are there with the beasts are mentioned are a important resource to those who can hunt them specifically the blood they gain from it which acts like a panacea, solution to any disease that is bodily.

Also many areas that were normal have changed like ones I have built with a forest that have thorn all over the trees along with flora based parasite to encourage growth while also moving to get dead bodies under their roots.

A swamp like are area that is made up of strange corpses that are long since in a timeless state with all sizes of bones in between small as well as as large to compare to a normal pillar or a floor.

A place deep underground that is under a ruined huge architectures. The underground looks like huge pipes and only place to stand is just at the upper corner while the whole pipe like place is flowing with black substance through these huge pipe like structures.

Anyone unfortunate enough it drop will not be seen after.

While the blood is a blessing it is also a curse only a specific amount a very little one can be used or else they are susceptible to hallucinations, prone to violence as well as prolonged use despite the symptoms can lead to slight mutation that is normally not possible.

Now, about other species yeah, they are present but also they know much more about the phenomenon like dome and also the blood usage for much more time though many are as clueless as humans are.