The Flatty Mushroom is a harvestable that can be found in the Frontier. It can be found from various sources and locations throughout the Frontier including but not limited to:
- Being harvested from Ancient Forest, Gnome Magic School, Great Pine Forest, Greenhorn Grove, Hoodlum Falls, Rubble Spring, The Deep Forest, The Forgotten Lands, The Maze Wood, Topple Hill, Topple Lake, and Topple Town.
In appearance, the Flatty Mushroom has a flat, light-brown cap similar in appearance to a plate. Its stem is also brown, although it is slightly tanner than its cap. Players can exchange 5 Flatty Mushrooms for 5,000 gold during the Slayer's Tasks. If the player has no purpose for the Flatty Mushroom, it can be sold for 110 gold.