This model is equipped with: Whirlwind vengeance launcher; armoured tracks.
In your Shooting phase, after this model has shot, if one or more of those attacks made with its Whirlwind vengeance launcher scored a hit against an enemy INFANTRY unit, that unit must take a Battle-shock test.
While this model has 1-4 wounds remaining, each time this model makes an attack, subtract 1 from the Hit roll.