A Life Shared
During the shared soul of the skill "One Soul" the rover elf may trade stats with the mount. The stats that can be traded are Vitality, Soul, and Power. The Rover elf can give the mount those stats if the mount needs them or can take them from the mount. Only one stat at a time can be traded and the limit is half the current stat. After all, neither the rover nor the mount will want the other to die.
