The "real" world

Being a Dark elementalist I have some questions about the extent of my ability, dark conjuration. Seeing how the limitation of this ability is that I have to use creatures from the "real world". Could I use creatures from the RP world, such as, but not limited to the Mongolian death worm? Now I already have a hunch of what the answer is to this question, therefor it is merely a side note. My real question pertains to when (and if) my character travels to khyper-diorem. Since khyper-diorem has different wild life, could I (if previously met and killed ) Summon these creatures to aid me in combat via my innate ability? Even if limited to when I visited khyper-diorem, I would like to know if I could use this to my advantage.

No. Real creatures from earth only. Just like shape shifting. If you have questions look at the shape shifting limitations. It is restricted to real animals in real life. Shadow creatures are quite powerful, and we don't need them any more powerful then they already are and giving an unfair advantage.