Saurus Sunblood

If the unmodified hit roll for an attack made by this model is 6, that attack scores 2 hits on the target instead of 1. Make a wound and save roll for each hit. In addition, if the unmodified wound roll for an attack made by this model is 6, that attack inflicts 1 mortal wound on the target in addition to any normal damage.

You can use this command ability when you pick a friendly Saurus unit to fight in the combat phase. That unit must receive the command. Until the end of that phase, add 1 to wound rolls for attacks made by that unit.