IMC Eldarin teleport works by briefly traveling into a coterminous plane. As a rule you can ignore artificial structures that haven't lasted a couple centuries, people and animals, but that's it. Real obstacles that exist on both planes stop you. The teleport isn't a means to fly or reach places you couldn't have walked to if were so inclined.
This ruling avoids most all of the problems pointed out here.
You know something I wondered about reading through the race section? Why half-elves but no half-eladrin? Why no Eladrin/Elf crossbreeds?
Again IMC eladrin *are* human. I'll quote the original post.
[bq]
Eldarin, Humans and the Tal Ishan
Humans are new comers on the stage of Carthasana, and though their numbers have grown their origins are more cloaked in myth than many of the other races which proudly trace their lines back to at least one of the five. What makes this more curious is that the arrival of humans on Carthasana is within the memory of some of the older dragons and a handful of Eldarin known collectively as the 'Tal Ishan' - meaning "They who remain" (Or one who remains, nouns of the Silesni language lack distinct singular and plural forms in a manner similar to Japanese in our own world).
Ages ago there was a war among the Eldarin to decide who would become god-king of the race. The participants and circumstances are mostly lost to time, but at the conclusion of the war those on the losing side where cursed with mortality by Januel, the leader of the winning Eldarin faction. Abora was angered by this, and while unable to end his curse she twisted it so that it only affected the children of losing faction - and these children where blessed with the fortitude necessary to one day take over the world. Meanwhile Januel's following where cursed in turn to fade from the world and be drawn back into their kingdom within the vast plane of Abora after a time.
Of those alive when these events occurred only five remain and they are among the most powerful creatures within all the multiverse. All but one of them nurse a powerful hatred of the Eldarin race and seek to do them ill. Humans themselves have through their mortality forgotten their heritage and do not know the nature of their relationship with Eldarin. The only clue lies in childbirth: The coupling of an Eldarin and a Human will give a member of the mother's race - not a half-breed as is the circumstance encountered with Elves. Eldarin persist upon the world for some 200 years before the calling draws them forcibly back into Abora. Eventually, the prophecies say, all members of this race will be drawn away.
Of the Tal Ishan the only one who's name is known among sagest is Telsindria - (from the Silesni name "Tal Sin Dre A" meaning One Last of First"). Elves and Eldarin today call her Li Eya - "Loved Lady" in recognition of her role as a mediator between them and the human kingdoms, and one of the few with wisdom and experience to dwarf their own as theirs dwarfs humanity in turn. The primary reason for her benevolence was she was born a mere moment before the curse took effect, making her the last of the firstborn. She does not personally remember the splitting war and though she nurses a sullen hatred for Januel and all the eldarin gods for their part in her suffering, she does not bear the eldarin themselves ill-will. The same cannot be said for the four other Tal Ishan, who are among the most formidable and deadly of foes likely to be encountered anywhere in Carthasana.[/bq]