Vicious Riposte

When: Fight phase, just after an enemy unit has
selected its targets.
Target: One Adeptus Astartes unit from your
army that was selected as the target of one or
more of the attacking unit's attacks.
Effect: Until the end of the phase. Each time a
model in your unit is destroyed, roll a D6, adding 1 if
Uphold the Honour of the Emporer vow is active.
On a 4+, do not remove that model from play.
Instead, after your enemy has completed their
attacks, attack with your model, then re