system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] If I had a pair of Lightsabers attached to separate pistons and directly facing each other perfectly head-on, then ignited and drove them towards each other what would happen when they make contact and keep pushing together?
gpt
What keeps the lightsabers blade shape is a magnetic field that loops around the plasma of the blade.

If you would force the two blades against each other you would eventually deform the field, causing it to brake down completely or at least partially at some places. The plasma of the blades would start leaking out uncontrolled and use up its energy in a short time.