Semi-Immortality

"Fifty years have passed... but I do not age. Time has lost its effect on me."

- Jack (Samurai Jack)

The power not to age. Sub-power of Immortality.

Also Called

 * Age Anchoring
 * Agelessness
 * Aging Immunity
 * Biological Immortality
 * Eternal Youth
 * Half-Immortality
 * Timeless/Unaging Body

Capabilities
Users of this ability never age, and as a result, they stay young forever or at least never suffer the ravages of aging. Because of this, the user will always be at their physical prime. The user will also be immune to aging abilities, such as Age Acceleration or Reversal.

Applications

 * Immunity to age-based powers.

Associations

 * Age Manipulation
 * Age Negation
 * Bionic Physiology
 * Decelerated Aging
 * Immortality
 * Multiple Lives
 * Old Prime
 * Regenerative Healing Factor
 * Telomere Regeneration
 * Temporal Lock

Limitations

 * User is still vulnerable to everything else that would affect other beings, from disease to mortal wounds.
 * Users may stop aging only after they reach a certain point.
 * Depending on what that point is, user may never reach adulthood.

Trivia
A number of organisms experience "biological immortality", which is essentially the real-world version of this power. Although they don't live forever, these organisms remain in their physical prime for the duration of their lifespan and do not "grow old" in the same way that humans do.

Known Users
See Also: The Ageless.

Comics/Cartoons
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 * Princess Bubblegum (Adventure Time)
 * Darwin Watterson (The Amazing World of Gumball)
 * Gumball Watterson (The Amazing World of Gumball)
 * Yakko, Wakko and Dot (Animaniacs)
 * Anodites (Ben 10 series)
 * Verdona Tennyson (Ben 10 series)
 * Ectonurites (Ben 10 series)
 * Ghostfreak (Ben 10 series)
 * Professor Paradox (Ben 10 series)
 * Black Adam (DC Comics)
 * Raven (DC Comics)
 * Shazam (DC Comics)
 * Kryptonians (DC Comics); via yellow sun radiation
 * Daxamites (DC Comics); via yellow sun radiation
 * Wonder Woman (DC Comics)
 * Timmy Turner and everyone else on Earth (The Fairly OddParents)
 * Jägermonster (Girl Genius)
 * Experiments (Lilo & Stitch)
 * Stitch/Experiment 626
 * Ben Grimm/Thing (Marvel Comics)
 * Olympians (Marvel Comics)
 * Peter Pan (Peter Pan)
 * Skips (Regular Show)
 * Guardians (Rise of the Guardians)
 * Jack (Samurai Jack)
 * The Guardian (Samurai Jack)
 * The Ones/Force Wielders (Star Wars)
 * Gems (Steven Universe)
 * Steven Rogers (Ultimate Marvel)
 * Jenny Sparks (Wildstorm)
 * Superboy (Young Justice)

Live Television/Movies

 * Adaline Bowman (The Age of Adaline)
 * Stanton Parish (Alphas)
 * Drogyn (Angel)
 * Lorien (Babylon 5)
 * Some Witches (Charmed)
 * Some Demons and Warlocks (Charmed)
 * Whitelighters and Elders (Charmed)
 * Darklighters (Charmed)
 * Cupids (Charmed)
 * Mermaids (Charmed)
 * Io (Clash of The Titans 2010)
 * Vera Moray/Granny Rags (Dishonored)
 * Rory Williams (Doctor Who); as an Auton
 * The Time Lords (Doctor Who)
 * The Doctor
 * The Master
 * Romana
 * Henry Morgan (Forever)
 * John Hancock (Hancock)
 * Mary Embrey (Hancock)
 * Adam Monroe (Heroes)
 * Ben Linus (Lost)
 * Hugo "Hurley" Reyes (Lost)
 * Jacob (Lost)
 * The Man in Black (Lost)
 * Mother (Lost)
 * Richard Alpert (Lost)
 * John Amsterdam (New Amsterdam)
 * Rumplestiltskin (Once Upon a Time)
 * Peter Pan (Peter Pan 2003)
 * Sylphs (The Spiderwick Chronicles)
 * Angels (Supernatural)
 * Archangels (Supernatural)
 * Demons (Supernatural)
 * Alphas (Supernatural)
 * Leviathans (Supernatural)
 * Doc Benton (Supernatural)
 * Four Horsemen of the Apocalypse (Supernatural)
 * Deities (Supernatural)
 * Wizard of Oz (Supernatural)
 * Powerful Witches (Supernatural)
 * Wendigos (Supernatural)
 * Phoenixs (Supernatural)
 * Golems (Supernatural)
 * Djinn (Supernatural)
 * Nachzehrer (Supernatural)
 * Werewolves (Teen Wolf); via Regenerative Healing Factor
 * Alexander Corvinus (Underworld)
 * Lycans (Underworld)
 * Vampires (Underworld)
 * Werewolves (Underworld)
 * Original Vampires (The Vampire Diaries/The Originals)
 * Enhanced Original Vampires (The Vampire Diaries/The Originals)
 * The Beast/Upgraded Original Vampire (The Vampire Diaries/The Originals)
 * Vampires (The Vampire Diaries/The Originals)
 * Original Hybrids (The Vampire Diaries/The Originals)
 * Hybrids (The Vampire Diaries/The Originals)
 * Powerful Witches (The Vampire Diaries/The Originals); via Spell Casting
 * Witches (Witches of East End)
 * Warlocks (Witches of East End)
 * The Mandragora (Witches of East End)}}

Literature
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 * Hunters of Artemis (Camp Half-Blood Chronicles)
 * Great A'Tuin (Discworld)
 * Dragon Riders (The Inheritance Cycle)
 * Elves (The Lord of the Rings)
 * Morla (The Neverending Story)
 * Peter Pan (Peter Pan)
 * Vampires (Shadowhunter Chronicles)
 * Warlocks (Shadowhunter Chronicles)
 * Sorcerers (Skulduggery Pleasant)
 * Elves (The Lord of The Rings)
 * Gandalf (The Lord of The Rings)
 * Gollum (The Lord of The Rings)
 * Dark One (The Wheel of Time)
 * The Young Guardians (The Young Guardians)

Video Games

 * Demigods (Asura's Wrath)
 * Chek Summoners (Breath of Fire IV)
 * Abbess
 * Gabriel Belmont/Alucard (Castlevania Lords of Shadows 2)
 * Trevor Belmont/Alucard (Castlevania Lords of Shadows 2)
 * Ghosts (Crypt of the NecroDancer)
 * Skeletons (Crypt of the NecroDancer)
 * Wraiths (Crypt of the NecroDancer)
 * Shelke the Transparent (Dirge of Cerberus)
 * Dog (Fable II/III)
 * Nyx (Fire Emblem Fates)
 * Rollermines (Half-Life 2)
 * Zoe (League of Legends)
 * Kokiri Tribe (The Legend of Zelda)
 * Ruby (Lunar: Eternal Blue)
 * Nall (Lunar: Silver Star Story)
 * Quan Chi (Mortal Kombat)
 * Shao Kahn (Mortal Kombat)
 * Alex Mercer (Prototype series)
 * Elizabeth Greene (Prototype)
 * James Heller (Prototype 2)
 * Aldra (Queen's Blade)
 * Albert Wesker (Resident Evil); after he is revived by the Prototype Virus his aging process seems to have stopped altogether
 * Brain (Skylanders)
 * Shadow the Hedgehog (Sonic the Hedgehog)
 * Judd (Splatoon)
 * Rosalina (Super Mario Galaxy)
 * The Dryad (Terraria)
 * Peter Pan (Valkyrie Crusade)
 * Anomalocaris (Valkyrie Crusade)

Mythology/Folklore

 * Vampires (Mythology/Folklore)
 * Viking Deities (Norse Mythology)
 * Werewolves (Mythology/Folklore)

Web Original

 * SCP-014 - The Concrete Man (SCP Foundation)
 * SCP-030 - The Homunculus (SCP Foundation)
 * SCP-590 - He Feels Your Pain (SCP Foundation)
 * SCP-1761 - The Republic of Arnold Fitzwilliams (SCP Foundation)
 * SCP-1810 - Mr. Pierrot (SCP Foundation)
 * SCP-2020 - Cliche, Right? (SCP Foundation)
 * Slender Man (The Slender Man Mythos)

Other

 * Malachite (Channel Awesome - Suburban Knights)
 * Merlin (Stupid Mario Brothers)
 * Nox Decious (Stupid Mario Brothers)
 * BLU Pyrogun (TF2 Freak)
 * Bluster Blaster Sentries (TF2 Freak)
 * Commander Bot (TF2 Freak)
 * Cremapyro (TF2 Freak)
 * CyborPyro (TF2 Freak)
 * Deed Goy (TF2 Freak)
 * Pyrogun (TF2 Freak)
 * Team Killer (TF2 Freak)}}

Known Objects

 * Font of Immortality (Fablehaven)
 * Ring of Winter (Forgotten Realms)

Known Locations

 * Neverland (Peter Pan)