Daemonic Invulnerability

When: Your opponent’s Shooting phase, just
after an enemy unit has selected its targets.
Target: One Legiones Daemonica unit from your
army that was selected as the target of one or
more of that enemy unit’s attacks.
Effect: Until the end of the phase, each time an invulnerable saving throw is made for a model in
your unit, re-roll a saving throw of 1.