>The waters around the pyramid broke upon the shores, black as oil, and churning as though an unseen tempest boiled beneath the surface. Space Wolves and Custodes ploughed through the water, wading through the crashing spray to reach the pyramid in lieu of aiding Leman Russ in his battle. Magnus swept his hands to the side, and the warriors on the water cried out in agony as it transformed into corrosive acid, burning through ceramite plates and rendering flesh and bone to jelly. (A Thousand Sons)