The Will of the Witch is the Figure in Bismuth's Hallow.
A hulking monstrosity in the shape of a knight, the Will of the Witch can nevertheless move with explosive acceleration. Splintering crystals run through its body, and when confronted directly, its use of enormous weaponry separates it from other mechs of its scale.[1] It has a shield welded to its forearm, enabling it to use both hands to wield a gigantic hammer.
It is compared to the Tower Knight from Demon's Souls, if it were made of PS1-era polygons.[2]