Crask cursed silently under his breath, he had let his anger get the better of him, and with his wild swing had lost any further chance of catching them by surprise. Losing concentration, he barely noticed the tentacle slowly approaching him from behind, diving out the way swiftly. This thing truly had a massive reach, and he realised it was foolish to remain at the back and leave the fighting to the other three, especially since Draco had taken his sword in that last exchange...