Crush Them

Use this Stratagem in the Fight phase, when a
Battle Tank or Super-Heavy model from your
army is selected to fight.
Until the end of the phase, each time that model
makes an attack against a non-Vehicle or Monster
enemy unit:
•Change it's WS to 4+, or 3+ if it has Armoured.
•On an unmodified 6 to wound, the target takes
1 MW in addition to any normal damage.