Umbral Voice of Southern Winds

Umbral Voice of Southern Winds:

Unique relic.

The blade is made from voidsteel, an Outside material that makes it effectively indestructible but also makes it consume the lifeforce of any soul who wields it.

The entire blade is magically void; it cannot be affected by spells, and spells cannot resist its edge.

Wounds made by the Umbral Voice are opened within the Tapestry of reality, preventing all damage resistance, including divine, preventing healing except by paragon or divine magic, and making it capable of damaging leylines.

Reference
Acquired in Chapter 278 "Testing the Blade’s Edge"