A black pot with golden coins inside and half of a rainbow coming out based on where you place it. Obtainable through the Saint Patrick's Day Pack in the gems store.Also obtained through special Saint patrick Day event. Has a rarity of 200. When broken, you have a chance of getting up to 200 gems.
On rare occasions this item when placed can potentially have a double rainbow one on either side. This was fixed by Seth and Hamumu during the Easter patch 2013. There was one in the world Blitzcrank but now it remains as one single rainbow as it does to this day.
-Blitz