Ogre

An ogre is a monster found in several locations for example Gu'Tanoth. A cage in the Combat Training Camp houses level 63 Ogres which can only be attacked through ranged or a halberd. This cage can be entered through railings at the side to retrieve drops.
The group of Ogres near Castle wars can be trained on with the use of a Dwarf multicannon, but as this is a popular traning spot you can expect some people to get annoyed.