I decided to write full lyrics to the Golgari song that Vraska sings to Jace during Ixalan story.
A castle grows in Old Below Its windows shine with an ancient glow Some wander its maze, a mess of decay And the Kingdom of Rot will rise one day
I’ve named it The Song of Korozda, and so far I have the draft for a verse and a bridge:
We monsters, in the dark we roam A cloak of moss, the mold our home The blackness enfolds and holds us tight To vanquish the searing dawn light
Clothe power in death, and strength in decay The Kingdom of Rot will rise one day
As for the actual melody, I know it’ll be slow, solemn, and in a minor key, but not completely somber, bringing a mood of inevitable growth. Either no instrumentation—only voices, to reflect the multitudes of the Golgari—or hollow-sounding woodwinds, bringing to mind the whistling of wind through crumbled ruins.