Sulliuscep

Sulliusceps are found in the Tar Swamp on Fossil Island. Chopping sulliusceps grant the player 83 experience per yield. Players can receive mushrooms and mort myre fungus from chopping sulliusceps, but they can also receive a sulliuscep cap at a rate of 1/250, which is used in creating mushroom pies. At level 65 Woodcutting, the estimated experience rate is 65,000 per hour, scaling to 90,000 at level 99.

There are six sulliusceps found throughout the swamp, indicated by the icon, but only one can be chopped down. Thus, players must traverse the Tar Swamp to find the choppable sulliuscep; the choppable sulliuscep is unique to each player, thus world switching will not change its location. Traveling through the swamp may require a rake to clear vines in addition to an axe. The swamp is home to extremely dangerous Tar Monsters, who deal typeless damage, and the deranged archaeologist, so bringing some form of recovery is recommended.

Should the sulliuscep spawn in a particularly dangerous area where the player is exposed to attacks from the deranged archaeologist or tar monsters, players can kill the sulliuscep instantly by using the "Inject" option, which requires 1 proboscis and 1 fungicide. This forces the sulliuscep to spawn in another area, which the player must find once more.

The spawning of the silliuscep seems to happen in the same order every time. This allows for easier gearing since you can predict wether you want to cut it or instantly move on. The order goes from the center back to the start. Ending at the eastern most spot.