Unstoppable
(Rule)Description: Any attack that normally inflicts Instant Death or says that the target model is removed from play inflicts D3 Wounds on a Gargantuan Creature of Flying Gargantuan Creature instead.
In addition, attacks with the Sniper special rule only cause a Wound on a roll of a 6. Attacks with the Poisoned special rule only cause a Wound on a roll of a 6 (unless the attack's Strength would cause a Wound on a lower result)