Who would think the floor itself was a threat? The well-prepared it seems! Although fairly rare, there are creatures that exist (likely manufactured somehow or formed in response to the predations of adventurers) that blend in expertly to the floor of a dungeon or dwelling, waiting until prey walks into their centre, whereupon they spring up from all sides and smother and/or crush them to death. Then they feed. Sometimes it feels like the world is out to get you, doesn't it? Instinct: To feed

• Surround and smother unfortunate prey from below
• Surprise them