Bloodmoon gu.

is a gu that is a blood colored crescent moon. The attack range is 10 meters away and makes people bleed.

Interseting fact: this gu created by Gue Yue Clan but in reality by first master of clan who is blood master and is grandparent of Fang juan.

Fang juan would make have it as vital Gu if not made liquoure Gu his Gu of vital.