Well, Edenians can live for a long time. But it has been proven that they can die. Reptile is accused of killing plenty of species, possible Edenians in MK4. Kng Jerrod is dead, rain's "father" is stated in MKT to be dead. Tanya is implied to have died in Jade's ending. So, yes, they can live for a while, but they CAN die

Semi-immortal.

I think they're like descendants of the Gods, but they can die and that makes them mortal.

Mortal with enormous lifespan.

They have incredibly extended life-spans, but if you CAN die, you are a mere mortal. Of course, in the case of Rain, whose father is a God, he might be a demi-god.

The following was pulled from ebay.com/games.

Edenia is a realm in the Mortal Kombat series of video games.

- About Edenia -
As its name suggests, the world of Edenia is one closely resembling the garden of Eden. It is a very fertile world, and its inhabitants seem to age much more slowly than normal humans would. They also appear to be preoccupied intensely with magic. It is a feudal monarchy much like most other realms in the Mortal Kombat universe. Edenia is also notorious for being invaded or annexed numerous times by other realms such as Outworld. Of all realms, it appears to be closest to Earthrealm in terms of environment and population.

The earliest known ruler of Edenia was king Jerrod. His best warriors lost ten Mortal Kombat tournaments in a row to the warriors of Outworld's ruler, Shao Kahn. By the rulings of the Elder Gods, this granted Kahn the power to invade Edenia. Outworld won the subsequent war and Edenia was annexed. To legitimise himself, Kahn forced queen Sindel into a marriage and adopted her daughter Kitana, among other members of the royal household. Edenia would be freed 10 000 years later from Kahn's grasp when his hold on power began to weaken due his failed invasion of Earthrealm. With brief intermezzos of war and abduction by evil forces, Sindel has been Edenia's queen ever since.

- Native realm species -

Edenians are human in appearance, though they live much longer, just like people from Seido, with whom they share the greatest resemblance. The skin tones of Edenians vary from white to black, but darker skin tones seem to be more prevalent.

Edenians are said to be discendants of the Gods themselves, because of their strength, warrior spirit and tremendously long lifespan, but yeah, it's only a myth.

And they are mortal. Long living mortals.

Question answered?

/thread.