On the mud I used to play for almost ten years, had a mage class with some
pretty nifty changes to some of the default spells. Basicly, teleport is
a reversed version of do_summon but it's specific to mages.

On that mud, mages would get locate object around level 6 or so, then around
level 24, a mage would get teleport. It's simular to portal as it acts like
a one way transportation spell but it has a drawback.. I removed the level
check between the caster and the mob for one reason.. If you teleport to
a mob that is much higher than you and you die, because he's aggie or whatever,
then it's up to the player to be more carefull when using the spell.

If you are a mage and you are in New Talos or some area other than Midgaard, you
can simply type, c tele fido and you will go to that room provided you passed all
of the room_flag checks.