ONLY IN DEATH DOES DUTY END

Adeptus Astartes - Epic Deed Stratagem
Use this Stratagem in the Fight phase, when an
ADEPTUS ASTARTES CHARACTER model from your army that
has not already been selected to fight this phase is destroyed.
Do not remove that model from play - it can fight
after the attacking model’s unit has finished making attacks.
After resolving the destroyed model attacks, it is then removed.