A couple of "wayshrines" could be scattered throughout the wilderness; they should be IN the wild rather than anywhere near anything civilized. They'd be inactive by default and to activate them you need to make a sacrifice, that way not everyone can just use these things. To be able to activate it you need to have HP, MP, SP above a certain amount. While activating it your HP, MP, SP get damaged 100 points each (or increase/decrease the number to whatever). The "wayshrines" wouldn't just teleport you to to a different one, they teleport you to a different plane (a small room, a plane of oblivion with no alignment, a tiny one). The first time you activate a "wayshrine" and try to teleport here, you'd bee greeted by the sight of several dead (not undead or ghost) adventurers and some unfriendly dremoras (that's why only a few can use these wayshrines). The dremoras are NOT respawning, they spawn only when you activate a wayshrine that's been inactve (so only once per wayshrine). After all of them are activated, no more dremoras spawn. While in the mini-plane of oblivion you're presented with "gates" that represent shrines on nirn, walk through and you teleport to its shrine, but to be able to teleport there you first have to activate it on nirn, until then the gates are sealed. Meshes for the gates could be the oblivion gate ones.