Wounds inflicted by Abominations can’t be prevented by Armor rolls (see Zombicide: Black Plague Rulebook p. 23).
A Damage 3 weapon is required to kill an Abomination. There is no such weapon in Zombicide: Black Plague’s core box. To slay the monster, your team needs to throw Dragon Bile in its Zone and ignite it with a Torch, creating a Dragon Fire (see Zombicide: Black Plague Rulebook p. 35). Samson can also achieve this at Red Level, using a Damage 2 Melee weapon in conjunction with his +1 Damage: Melee Skill (see Zombicide: Black Plague Rulebook p. 51).
