Princess Cadence, an immortal alicorn does something drastic to keep her mortal lover Shining Armor alive.

Story: https://www.fimfiction.net/story/389093/keeping-him-shiny

Art: https://cdn-img.fimfiction.net/story/tykm-1508318100-389093-medium

Music: Arms of Heaven by Aakash Gandhi (free YouTube download)