Goblin
All goblin-kin share some traits. They are usually much shorter and wirier than humans. They are generally very agile and belligerent. Goblin-kin have a certain, natural penchant for cruelty and anger. And, they are, by nature, all male, needing to capture and transform human women as a means to reproduce. However, that reproduction cycle is entirely faster than humans, and goblin-kin are typically born within a week of conception. This is due to their highly shortened chances for survival since they constantly kill each other. There are countless types of goblin-kin around the world, but they are all subterranean monsters, hating the sunlight and preferring to pilfer and kill at night. The final unifying trait which they all share is the uncanny and natural affinity for portal conjuration and teleportation. Almost any goblin-kin can open a portal, step through it, and appear somewhere else entirely.
In folklore a goblin is a monstrous creature that appears in the mythology of multiple European cultures, first attested in stories from the Middle Ages. They are ascribed various and conflicting abilities, temperaments and appearances depending on the story and country of origin. They are almost always small and grotesque, mischievous or outright malicious, and greedy, especially for gold and jewelry. In reality, goblins match that description rather well. The namesake of the goblin-kin race, goblins are the eldest of their kind. Like trolls, they formed from Nergalian plague; this infected a cadre of dwarves that had fought away a force of the demons. After they succeeded, they began mutating, and collapsed the cavern, however a few survived and now twisted and evil, they made their way into deeper places.
Goblins are cruel, twisted, and devious by nature. There are no naturally occurring goblins, but goblin shamans have found a magical rite that will change a human female into one of their own. They are the smallest of their race, but are also the most prolific. Many times, goblins can be found in swarms wherever trolls live. They form a type of symbiotic relationship, with the trolls capable of fighting larger enemies and the goblins as servants to perform tasks for their master.