"A wizard's test subject met his fate when his soul was absorbed into the strings of this bow. When an arrow is drawn, his screams of pain can still be heard."
Bind On EquipTierVScales With:DEX 100%6.0Weight3000Durability
We can't find any source for this item (quests reward, drop, etc). It's highly probable this item is not obtainable right
now.
It seems that the New Bow of Arcane Sacrifice is obtainable.