Can some intelligent organic creatures be immortal?

Can some intelligent organic creatures be immortal?

If we are thinking that some creature would have the ability to clone itself and transfer the memories to the clone, that would make the lifeform immortal. But would the creature be immortal and have the same body all the time. The fact is that the creature must have the ability to deny the DNA oscillation, or they should minimize the radiation and changes in chemical and physical environments. So those creatures would live in darkness or the nightside of the planet or maybe in some caves. And minimize the radiation dose and the chemical influence on their body. 

The fact is that the DNA of those creatures must keep stable by keeping the cells in high pressure. Or the DNA can be stored in the digital form. The base pair order can be stored in the memory of the computer, which means that nanomachines would create a copy of genomes by using the order of base pairs.

But can some creatures have similar abilities with the Emperor in the Star Wars movies? What kind of thing that kind of creature must have? The fact is that for making the energy lightning the creature must have the nervous system, which creates extremely high voltage electricity, and that means that the creature can hybridize itself with an electric eel, and that thing makes the ability to give electric shocks by using the neural electricity. And the same way neural electricity can be used to take the person under control. 

There is a couple of ways to make electric lighting without hybridization. The first way is to hide the taser or radio wave-based system to arms, and when the target is visible the electric shock can impact the target. And if the system also transmits the neural electric impulses, that thing allows taking the target to control. That thing requires external electricity can cover the natural electricity of the targeted person. 

Another and more futuristic version is to cover the neural system by using nanotubes, which is pumping power to the neural system. Those tubes might also operate independently, and when the neural system gives the order, those antennas would send the electric lighting to the target. The system can pump energy itself by benefiting radio waves. Or it can create it by using the Casimir effect if the creature is advanced enough.