Hell was no pleasant place, nor one you could simply decide to visit on a whim.
Even Hircine, with his mighty divine power, had to ponder how to enter Hell. It was impossible for his true form to enter; most deities hid within their Divine Realm and rarely wandered about.
Even if Hircine desired to take the risk, Hell itself would reject his entry.
And since Hircine had no cordial relations with the devils of Hell, it was difficult to find someone to open a backdoor for him.
Hircine could only create an avatar and then kill it, allowing the weak soul bearing Hircine's consciousness to descend into Hell.
However, being an avatar of a deity, although weak in power, it was not so feeble as to be consumed by maggots upon falling into Hell and turned into a demon after being excreted.
The moment this soul arrived in Hell, it began absorbing magic power, binding with the toxic and metallic soil to form an Earth Puppet-like demon.
