A Warp Grinder is a powerful tunnelling device, capable of rapidly boring through the earth an leaving a wide tunnel in its wake, through which the Skaven scurry to ambush their enemies.
R S AP Special Rules
Warp Grinder Combat 5 -3 (Ambushers), Killing Blow, Requires Two Hands
Notes: If a Weapon Team is equipped with a Warp Grinder, both it and its parent unit gain the Ambushers special rule