Souls of Unbright

Souls of Unbright are Hardmode crafting materials dropped by enemies in The Shadow (Surface Biome). They are used to craft a variety of pre-Mech Boss weapons. They are the equivalent of the Confection/Hallow's Soul of Light and Crimson/Corruption's Soul of Night.

Book of Shadowflames
Crafted at a Bookshelf
 * 1 Spell Tome
 * 20 Shadowflame Cores
 * 15 Souls of Unbright

Shadow Wings
Crafted at a Mythril/Orichalcum anvil
 * 10 Feathers
 * 20 Souls of Flight
 * 25 Souls of Unbright

Key of Unbright
Crafted at a Workbench
 * 15 Souls of Unbright

Unidentified Voodoo Doll

 * 1 Soul of Light
 * 1 Soul of Night
 * 1 Soul of Unbright
 * Any type of Voodoo Doll (Guide, Clothier)

Shadowflamethrower
Crafted at a Mythril/Orichalcum Anvil
 * 20 Iron Bars
 * 1 Illegal Gun Parts
 * 15 Souls of Unbright

Shadeblade
Crafted at a Mythril/Orichalcum Anvil
 * 15 Adamantite Bars
 * 12 Souls of Unbright
 * 2 Souls of Night

Wraith Staff
Crafted at a Mythril/Orichalcum Anvil
 * 15 Souls of Fright
 * 5 Souls of Unbright
 * 8 Hallowed Bars
 * 5 Souls of Night