First Born (Babylon 5)

The First Born, a.k.a. Speakers, were the first sapient species to evolve in the galaxy, about 7 billion years ago.

Biology
The First Born seem to have a humanoid form, although since they are an ascended species, it's not known whether this form represents their original appearance. In their humanoid form, they have flat faces and inhumanly long fingers. They can transfer their life essence to heal other creatures and even revive others from death. While the First Born themselves are biologically immortal, but can still be killed by illness or injuries.