MUTANT STRAIN

Use this Stratagem in the Fight phase, when a POXWALKERS unit from your army is selected
to fight. Until the end of the phase, each time an attack is made by a model in that unit:
An unmodified hit roll of 6 inflicts 1 mortal
wound on the target in addition to any normal
damage. An unmodified hit roll of 1 inflicts 1
mortal wound on that POXWALKERS unit
after that fight is resolved.