Self-Sustenance

Self-Sustenance is the ability to be able to survive without things that normal humans need to survive like oxygen, food, and water.

Characters
Emma Frost: While in her diamond form she can live without food, water, and oxygen.

Hulk: He is able to survive without food, water, sleep, and oxygen.

Juggernaut: His body doesn't need oxygen, food, water, or sleep.

Methods
Juggernaut: The Juggernaut is completely self sustained, he has no need to breathe, eat, or drink. He cannot tire, hence he cannot sleep, however his self generating mystical energies provides him with the nourishment of sleep, nutrition, hydration, and oxygen. He is sustained by his mystical energies alone.