After the rift between the two worlds opened decades ago, the boundaries that once separated Earth from its parallel counterpart had blurred, at first temporarily, but now, almost irreversibly.
Not only had people gained access to new resources and strange abilities, but entire ecosystems had begun to seep through, as if the world on the other side had decided to migrate, piece by piece, into this one.
At first, it was chaos. Skies that once saw nothing but birds and clouds now had streaks of crimson winged serpents and glowing feathered reptiles gliding over mountaintops.
Forests became alive with sounds no biologist could recognize.
But as time passed, and as the world adapted, regulations and response units came into place.
The most dangerous creatures, those that breathed acid, warped reality, or hunted in organized packs, were swiftly exterminated or banished back through controlled rifts by specialized military divisions. But not all creatures were threats.
