Self-Destruction

Use this Stratagem in the Fight phase, when a Canoptek Scarab Swarms unit from your army is selected to fight. Select one model in that unit.
After that unit has finished piling in, you can
select one enemy unit within Engagement Range
of that model and roll one D6: on a 2-5, that
enemy unit suffers D3 mortal wounds; on a 6,
that enemy unit suffers 3 mortal wounds. The Canoptek Scarab Swarm model is then destroyed.