Power Stake
From Warhammer 40k - Lexicanum
Power Stake[2]
A Power Stake is a weapon often used by Witch Hunters of the Inquisition.[3]
This power weapon is a solid rod of iron sharpened into a stake at one end and housing a power field generator on the other. The length of the rod is inscribed with warding runes and sigils.[3] Upon striking a psyker, or similar creature of warp-affinity, it will be set ablaze.[1][3] Being a long iron rod that is sharpened at one end, as well as charged as a power weapon, it is also an effective weapon against non-psychic foes.[1]
Images
Power Stake[3]