Defiler

Models with the Daemon special rule have a 5+ invulnerable save, and also have the Fear special rule.

Once per game, a model with this rule may re-roll failed to wound/penetration rolls. Declare at the start of the shooting or assault phase that you are using this ability.
At the end of the phase, roll a D6, on a 1 the unit loses a HP with no saves allowed.

A unit composed entirely of models with this special rule can re-roll one or more of the dice when determining Run moves and charge ranges (such as a single D6 from a charge range roll, for example).

At the end of each of your turns, roll a D6 for each of your models with this special rule that has less than its starting number of Wounds or Hull Points, but has not been removed as a casualty or destroyed. On a 5+, that model regains a Wound or Hull Point lost earlier in the game.