You can trade this idol part 1 for 1 for another body.
You can win this item on the Squeal of Fortune minigame from October 18th 2013 00:00 GMT to October 28th 2013 23:59 GMT. After November 8th 2013 23:59 GMT it will be removed from the game.
When you activate an idol piece, you will receive XP several skills, one of which is a combat skill. If you do not wish to received combat XP, you can right-click toggle the earning of combat xp. This choice applies across all idols and their parts.
The idol piece will provide XP in the following skills: Agility, Crafting, Fletching, Ranged, Smithing. The total XP given is 0.5x the amount given for a small prismatic lamp, and this is divided equally between the 5 skills that the idol piece gives XP in. The table below shows the amount of XP you will receive at your level in each skill (e.g. if all of your skills are at level 10 you will receive 76.5 XP in total; 15.3 in each skill).