Children of Nidhogg
Goblins, to a one, are mad.
Best anyone can tell, they revere an old spirit called Firetongue, a personification of trickery, deception, wonton destruction and (as the name implies) fire. Firetongue may be a goblin-god, a powerful demon, a dead god that only they somehow remember, an elemental, or just a made-up wall-painting that the goblins forgot they made up in the first place.
With goblins, it’s hard to say. They usually don’t spend much time talking about the finer points of their society with civilized folks. They’re usually more concerned with burning down those civilized folks’ homes.
Goblins are mean, vicious creatures. They take great enjoyment from causing destruction and pain. Usually, their methods are direct: a midnight raid, torches thrown through windows, with archers to take out those who would try to run away. Sometimes, goblins strike with surprising cleverness, luring others into devious traps that may have been set over several days.
Goblins breed like any other race, though more prolifically than most. They can also turn others, particularly humanoid children, into goblins through secret rituals, which they consider a sacred rite. The details of this process have been put forth by several so-called scholars, but the explanations and details are often vastly different or even contradictory, leaving the truth of the matter a mystery.
One of the most disturbing traits of goblins is that they frequently sing in rhyming verse while their mayhem ensues. It seems against their nature to practice such songs (as practice requires a level of discipline usually thought beyond goblin capabilities), but they rarely miss a note or word. It has been noted more than once that when an individual goblin stumbles over the words, his kin will often turn on him with glee, killing him violently. It has been suggested that these songs, then, may be some sort of ongoing game or competition within their culture.