Immortal

Immortals are beings incapable of dying of natural means, the opposite of mortal. They can however, still be killed by magic, weapons, disease, etc. unless they are immune. Although beings can be born immortal, some acquire immortality through other means.

Notes and Trivia

 * Mermaids can willingly give up their immortality. It is uncertain if other immortals are also capable of doing so.
 * Their immortality can also be passed on to other beings. The Sea Hag was planning on giving Mylie's immortality to Necron.