You may cast this on one Orc or Goblin unit (of any type) within 24, provided that the target unit could charge the enemy if it was the greenskin's Magic phase. If successfully cast, the unit will attempt to charge - move the unit 2D6" towards the enemy. If there is a choice of targets, move the unit towards the closest. Any unit that moves into contact with an enemy unit counts as charging in the usual way. The enemy are caught by the suddenness of the advance and can only hold before greenskins charging with the Hand of Gork - they can't stand & shoot, flee, etc. Note that if the enemy cause fear or terror; the charge is treated as pursuit into fresh enemy.