Tomonoshin will be unrestricted, and Obstruct put to 1! Check out the details on the official site.
■ You may only cast this card during an attack phase, and if you have a monster with "Jackknife" in its card name on your field. ■ [Cast Cost] [Pay 2 gauge] ■ [Counter] During that attack phase, if your life would become 0, it becomes 1 instead. You may only cast "Jackknife Linker" once per fight.