By sacrificing the House of Erebus, Deacon Frost (Blade) became the avatar of La Magra.
Genryūsai Shigekuni Yamamoto (Bleach) sacrificed his arm to activate "Hadō 96: Ittō Kasō".
The potion Voldemort (Harry Potter) used to regain his body required his servant to willingly sacrifice a piece of flesh as one of the three ingredients.
Lily Potter (Harry Potter) sacrificed her own life to grant Harry a powerful protection.
Twinrova (The Legend of Zelda: Oracle of Ages and Oracle of Seasons) sought to sacrifice Princess Zelda to resurrect Ganon, but due to Link's interference, they were forced to sacrifice themselves instead.