Dawn of Civilization
Hiding in the darkest corners of the Burning Valley, wait the Tannim. These shadowy hell hounds hunt in packs that seek out anythin not native to the Realm to chase and overpower, using cunning guerrilla tactics to rend them to pieces. Such attacks will force a Paragon to extend his sojourn, possibly adding years to his returning in real time to as he must begin the rejuvenation process anew and stray from his path to flee the hounds.
The Tannim have an ability called the Soul Rend. They can rip a spirit from its physical body, creating a wraith-like being until it can repossess its body. For a Paragon, this is incredibly inconvenient as they must add years to their Sojourn in Jahannam while they regenerate their bodies. Other beings may not be as lucky, unless they are capable of re-creating their body or at least healing massive amounts of trauma.
Because the Paragon takes nothing with him into Jahannam but his physical body, these attacks go virtually unopposed save for bare fists and the jagged rock of the valley itself.