GENE-WROUGHT MIGHT

{r}Use this Stratagem in the Fight phase, when a
PRIMARIS unit from your army is selected to
fight.
Until the end of the phase, each time a model
in that unit makes a melee attack, an unmodified
hit roll of 6 automatically wounds the target.
Blessed with incredible strength, Primaris Space
Marines deliver blows that inflict terrifying damage.