Boardgamegeek https://boardgamegeek.com/boardgameexpansion/201629/runebound-third-edition-fall-dark-star-scenario-pa
English - The coming of the dark star has long been foretold among the dark prophets of Terrinoth. When it falls, they say, an age of darkness will overtake the world, and its coming shall be heralded by a rain of dark shards that corrupt every stout and honorable soul.
Ludovox http://ludovox.fr/jeu-de-societe/runebound-3e-la-chute-de-letoile-funeste/
French - Extension "Fall of a dark star" scenario pack.