It's not actually a field, per-say, but more of an area of small, mine-like sinkholes. It's like the ground is always shifting and is very dangerous, even for the most trained RowanClan warrior. Some of the tremors and movements are so sudden that even they can't detect it coming. Apprentices are forbidden from coming here without their mentors. RowanClanners are often finding the dead body's of rogues crushed and smashed here. It's rather gruesome.