Any Tomb Scorpion or unit of Necroserpents may have this special rule for +2 points per model. When a unit with this special rule is placed on the battlefield as a result of using the From Beneath the Sands special rule, it may nominate a single enemy unit that is within 8" of it and whose troop type is regular infantry or heavy infantry. The nominated enemy unit must immediately make a number of Initiative tests equal to the Unit Strength of this unit. For each test that is failed, a single model belonging to the nominated unit is removed from play as a casualty.