Weight of Duty
From Warhammer 40k - Lexicanum
The Weight of Duty is an Astartes power maul used by the Hammers of Dorn Chapter. Its flat head is lined with a miniature grav-plate, similar to those that line the decks of great voidships. Upon striking a foe, the grav-plate activates for a brief instant, multiplying the hammer's impact many times over by increasing its descending weight.[1]
Source
- 1: Deathwatch: Honour the Chapter, pg. 136