Razorback

In your Shooting phase, after this model has shot, select one enemy unit hit by one or more of those attacks. Until the end of the turn, each time a friendly model that disembarked from this Transport this turn makes an attack that targets that enemy unit, improve the Armour Penetration characteristic of that attack by 1. The same enemy unit can only be affected by this ability once per turn.

This ability always takes the form Deadly Demise X. Each time a model in this unit is destroyed, after the units embarked within it (if any) have made their emergency disembark moves, roll one D6. On a 6, that model suffers a deadly demise; each unit within 6" of that model suffers a number of mortal wounds denoted by X (if this is a random number, roll separately for each unit within 6").  Example:* An Impulsor with a unit of Intercessors embarked within it is destroyed by ranged attacks. First, any unresolved attacks made by the attacking unit are resolved. Then the Intercessors make an emergency disembark move. Then the roll is made for the Deadly Demise* ability, and on a 6, that ability is resolved. Finally, the Impulsor is removed from the battlefield.