Dismantle is your unlimited-range disarm. Rip off an Eight Trigrams armor, a Red Hare or Shadow Runner horse, or a Repeating Crossbow before your team piles on the Attacks. Rebels love it for stripping the Lord's defenses, while Loyalists use it to disarm the lead Rebel. It can also pull a Lightning or Supply Shortage out of an ally's judgement area. It pays off most against a target hoarding equipment.
Gan Ning is the natural partner — his skill turns black cards into Steal or Dismantle, spitting out disarms all game. Pair it with Steal as a disruption package; once you've torn off the target's Eight Trigrams and horse, finish with an Attack or Duel.
A Negate stops it cold — save one for your key piece, especially the Lord's Eight Trigrams. Dismantle only takes one card at a time, so don't pile up pricey gear as free targets; get value out of a horse or weapon before it gets stripped. Against an empty hand with nothing on the table, Dismantle barely does anything.