Skaven Chieftain with Battle Standard

In your hero phase you can declare that this model will plant his battle standard and call upon the curse of the Horned Rat. If you do, you may not move this model until your next hero phase, but you may immediately roll a dice for every enemy unit within 10" of this model. On a 4+ that unit suffers 1 mortal wound.

If your general is a Skaven and has only 1 wound remaining, a Skaven Chieftain with Battle Standard can stab-stab him in the back if he is within 1" of him at the start of your hero phase. If he does so, your general is slain; this model then becomes your general and gains any command abilities known by his former master.