The Dreaded Thirteenth Spell

If successfully cast, pick 1 enemy unit within range and visible to the caster, and roll 13 dice. For each 4+ that unit suffers 1 mortal wound.

You can then summon 1 unit of CLANRATS to the battlefield, and add it to your army. The summoned unit can have up to 1 model for each mortal wound that was caused by this spell. The summoned unit must be set up wholly within range of the caster and more than 9" from all enemy units. The summoned unit cannot move in the following movement phase.