If this card is in the soul of a monster with "Jackknife" in its card name, that card gets [Move] and [Penetrate].
"Dragoners` Armory" When the attack of a monster with "Jackknife" in its card name and with this card in its soul is nullified, for this turn, that card gets [Double Attack]. "Dragoners` Armory" only activates once per turn.