Think Dark Souls: huge orchestra plus choir. Lyrics are secondary; the attraction is the scale of a god, final boss or apocalypse arriving.
Search with Epic
Start with Epic Orchestral Music; add choir, dark, sacred or apocalyptic. Production music likewise uses Epic for large strings, brass, percussion and often choir.
Not just gacha rarity
Common → Rare → Epic → Legendary makes Epic feel like “the purple item,” but the word comes from epic poetry and carries grand, heroic meaning. Everything BIG.
Armor everywhere
Grand→heroic→adventure→knight→ARMOR. You wanted music; YouTube gave you the world-saving party photo.
Dark Souls mode
Add dark, choir, sacred, gothic, apocalyptic. Motoi Sakuraba described Dark Souls recordings with strings, brass, harp, percussion, choir and solo vocals. The point is the scale.

