"... And Fiona stands with a cry, and that is almost all the warning there is; every flame in the room spits forth a gout of darkness, a tower of black fire, a torrent of incarnate night. Benedict is on his feet, as smooth as an oiled machine, as the tenebrous eruptions split and shower to the floor as perhaps a hundred *things*, each sharp-limbed and inky black, flickering like the fires from which they come. ..."Corwin's goblins are creatures of black flame, conjured through real fires from some barren plain. Their arms can be blades; their bodies absorb wounds uncaringly; and, in essence, they want a lot of people dead. There are indications that their unusual nature also gives them unusual weaknesses.
-- Shavings of True Stone (the game)
Shavings of True Stone