Кстати нет, я наглый врун, ибо не дочитал уточнение:
Power weapons
A power weapon (typically a sword or axe, but sometimes a glaive, halberd, mace, etc.) is sheathed in the lethal haze of a disruptive energy field, eating through armour, flesh and bone with ease. Some very rare power weapons may even give a Strength bonus or have other additional special rules, as detailed in the appropriate army Codex; these weapons lose the Parry special rule, though.
Parry: A power weapon that has no additional special rule confers an invulnerable save of 5+ against Strike actions to its wielder.