Enter a dormant state.
The power to
enter an intensively dormant state. Sub-power of Metabolic Manipulation. Opposite to Accelerated Metabolism.
The user can enter
hibernation, a state of inactivity and metabolic depression/suppression characterized by low body temperature, slow breathing and heart rate, and low metabolic rate. User may be able to slow the metabolism to the point of effective death.
The purposes of hibernation include conserving energy, safety reasons, healing, etc.
Lorophage demons (Angel & Faith) enter hibernation for decades at a time until "the stars of the Old One's that birthed them align."
Aang (Avatar: The Last Airbender) was frozen in an iceberg for 100 years.
As one of the current queens of the chiropteran race, Saya Otonashi (Blood+) periodically enters thirty-year hibernation cycles.
Karl Ruprecht Kroenen (Hellboy)
Goddess of Dawn (Invaders of the Rokujyoma)
Naraku (InuYasha) can enter a deep hibernation.
The Creeper (Jeepers Creepers) spends much of its time hibernating, only awakening every twenty-three years for twenty-three days of spring.
Pillar Men (JoJo's Bizarre Adventure Part II: Battle Tendency)
Rock Humans (JoJo's Bizarre Adventure part 8: JoJolion) hibernate for months at a time by turning into stone.
Apocalypse (Marvel Comics)
Snorlax (Pokémon) sleeping.
Necalli (Street Fighter) hibernates for centuries at a time, only awakening during the "Hour of Battle" every few hundred years.
Cthulhu (Valkyrie Crusade)
Eugene Tooms (X-Files) is a nearly-immortal mutant who can enter a fifty year hibernation after feeding on sufficient human livers.