Darkness Valkyrie Bow

Obtained from

 * Crafted by Blacksmith
 * 1 Desperate Apostle Bow
 * 13 Traces of Freyjas
 * 1 Twilight Shadow Piece
 * 100 Mysterious Crystals
 * 27 Diamond Anvils

Upgrades to

 * Pitch Darkness Valkyrie Bow