Their power was of sea and ice and seemed to be connected to Omtose Phellack.
When seen, they were usually armored, armed with lances of ice and riding mounts that appeared to be half horse, half wave.
Both their origin and aims were shrouded in mystery, as they were generally feared and viewed as antagonists, yet one was shown (in the epilogue of Night of Knives) asking a local Malaz City resident "Why are you killing us?"
Their sorcerers were known as wandwielders.
They described as fair, with pale hair resembling Tiste Andii.