A Warp-Grinder is an arcane reality-boring machine. Manoeuvred by straining thralls and operated by Warlocks who have taken their obsession with undermining their foes to terrifying extremes, these bulky constructs project powerful – if erratic – blasts of energy to open gnawholes, and tunnel into vulnerable regions of a battlefield to allow screeching warrior swarms to set upon enemies from quarters unforeseen.