Mother Haggle has many enemies. None of these is more persistent and more enigmatic than the Sandman, an Archfey who harbours an old grudge against the cantankerous old lady. Every now and then, the Sandman marshals his forces, and murders a bunch of her mercenaries. Mother Haggle doesn’t see any real need to mention this ahead of time - the chances of it impacting any one group of mercenaries are very slim. You probably have nothing to worry about.