DSC is the most powerful martial art skill in Saga Frontier which cost highest WP from all martial art skills. It deals very big damage to single enemy/boss approximately can goes about 10k-28k. However there are some boss which cannot be attacked by DSC like earth dragon because his enormous body, yet this skill still deadly even to most of final bosses.

Here is how to unlock:
You need to have martial art skills Slide, Suplex, Collapse, Giant Swing listed in your characters skill arts. If you don't have these skills, here is the action art skill you need to use in the battle to unlock the skill:
Punch - Unlock Slide
Tumble - Unlock Suplex, Collapse, Giant Swing

Then, you can put these 4 skills into your characters skill arts.


Once you are in the battle, it will appear the new skill DSC which cost 18 WP


If you want to see the clear guide in video, you may check this video guide.
https://youtu.be/Kv8cDXMNpoA