Troll lieutenant's bones were dropped by the trolls Magic Stick and Anvil during the Troll Warzone members tutorial. Although they no longer exist, they still spawn at the south end of the Taverley Slayer Dungeon after the tutorial.
They give 6.5 prayer experience when buried and when put into the bone grinder at the Ectofuntus, they turn into bonemeal identical to that given by big bones, worth 60 experience. When they are fed to the Baby Troll, it will change its name to "My dad's friend."
This item can be disassembled with the Invention