Monsters are creatures from other worlds brought to Runera during the [[Coalescence]]. When the [[Mantle]] was shattered, countless tears in reality formed across the world, causing monsters to be forcibly transported to Runera where they wreaked havoc upon mortalkind. Monsters are incredibly diverse in their traits and origins, having come from legion different worlds, but are all united in their weakness to silver. The precise reason as to why silvered [[weapons]] are so lethal to monsters is not fully understood, but even millennia later it remains the first line of defense against their devastation.
Many monsters are akin to beasts: incapable of complex thought and driven by base instincts such as hunger and fear. It is perhaps these creatures that cause the greatest trouble for common folk, as they encroach upon settled lands to feast upon the innocent. Other monsters, however, possess greater sentience, such as giantkin, goblinoids, and draconids, with some being as intelligent as the Children of [[Alor]]. The [[Hand of Alor|Hand]] and many other groups hold that it is these "Interlopers" that pose a subtler but ultimately greater threat to mortalkind, as they will attempt to supersede and depose the Children of [[Alor]] so they might claim Runera for themselves.