The Rune of Mechella

Mechella the Sultana of Shadows had been charged by Necronias to prepare the ground for the Plague of Banes. She was to further the spread of their corruption. She had been given a musical composition by her mother the Void Queen to act as the host for the bane Lust. In order to spread its contagion, Mechella sought out the fallen Avatar of Love, Icaribil. The Damned Musician was at that time trapped within the Necromancer’s Citadel, eternally playing the overture of his opus, the Nocturne. He played the overture again and again without ever being able to reach its finale for Necronias had torn the sheet music of the Nocturne in two and had cast the finale into the Citadel’s Hall of Broken Lore.
Mechella had shadow-scryed that one day a small band of heroes would enter the Hall of Broken Lore and use the finale of the Nocturne to free Icaribil. The Sultana of Shadows devised a ruse by which she would replace the finale of the Nocturne with the composition that held the bane Lust. Mechella shrouded Lust's arrangement with her Shadows of Doubt causing Icaribil and all others to see Lust's composition as the Nocturne. She left Lust's masterpiece on the floor of the hall scattered amongst other broken lore for the future heroes to find. The heroes would believe that they had saved Icaribil, but, in fact, they would damn him further by making spread the corrupting touch of Lust upon the land.
The Sultana of Shadows then opened a shadowbox and placed the true finale of the Nocturne within it. Mechella's shadows dribbled from her fingertips into a shadowy inkwell which she used to write a locking incantation on a blank piece of parchment from the floor. She smoothed the inscribed parchment over the opening of the shadowbox sealing it. She pulled off the locking parchment to reveal nothing but a bare wall. The shadowbox, once sealed, had vanished entirely. Mechella then tore up the locking scroll so that no one could find the shadowbox and recover the true finale. The shadow sorceress completed her mission by weaving spells in the Hall of Broken Lore and elsewhere to protect the Nocturne's true finale and the reign of Lust.