Immortality has these relationships to other tropes:

parents kids shares a parent with:
Age Without Youth
Body Backup Drive
Body Surf
Complete Immortality
Exposition Of Immortality
Fighting A Shadow
From A Single Cell
Healing Factor
Immortality Inducer
Life Drinker
Living Forever Is Awesome
Nigh Invulnerability
Nigh Invulnerable
The Undead
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