From publisher blurb:
In the wake of apocalyptic devastation, nature itself has been irrevocably altered, giving rise to creatures that defy all logic and reason. Once familiar species, shaped by the cruel hands of radiation, toxins, and unnatural forces, have transformed into grotesque monstrosities. In this booklet, we explore 10 of these nightmarish mutations—beasts whose forms and behaviors have evolved into something far more dangerous than their predecessors. These warped versions of their original species now roam the wasteland, each one a deadly reminder of the world’s descent into chaos. From towering predators to unrecognizable horrors, these creatures challenge the very concept of survival in a landscape where the laws of nature no longer apply. Venture forth if you dare, and witness the unimaginable grotesqueries born from the ruins of the old world.
The is a booklet of Post Apocalyptic Monsters for use in 5e.