Myr'ghar
From Warhammer 40k - Lexicanum
Myr'ghar, the Blade Spirit, is a Necromunda Warrior Spirit, who is worshiped by the Hive World's Tsun'ghar Ash Waste Nomad tribe.[1]
Description
Those who call upon it have their blades become razor-sharp and feel like extensions of their bodies. This allows the weapons to be able to easily carve through armour, flesh and bone.[1]