Age of Conan has been updated with the Pit Master's Arena that allows for 'traditional' player versus player action but also features player pets versus game pets / creatures. Players can use pets they've created to fight creatures from all over Hyboria to earn other pets, necklaces, faction mounts and more.
The arena features a slew of new rewards, including new pets, powerful necklaces, and unique faction-specific mounts! Discover four all-new Rune Stones through the arena, providing effects such as additional Constitution, protection bonuses when critically struck, or a surge of power when low on health. Slake the soil with the blood of the unworthy!
You can check out more on the Age of Conan site.