Work Text:
Cursed Energy: the underlying power for nearly everything in JJK's magic system; stems from Negative Emotions; needs to exceed a certain amount to make one a sorcerer, otherwise you're just a normal human who can nevertheless create curses unknowingly.
Cursed Energy Manipulation: basic steps to wield cursed energy successfully; branches up to Taijutsu, meaning you can enhance your physical strength and endurance with cursed energy. After a certain point of using cursed energy manipulation with Taijutsu, comes the possibility where you're able to achieve a Black Flash. A black flash is a momentary increase of your cursed energy by the power of 2.5; it can also reset your cursed energy output.
An Innate Domain has been described as one's soul. You can say cursed energy gave you the means to access it. If you're past that point you can create a Curtain, the most basic form of Barrier Techniques used to conceal what's going on in an area and restrict entry and exit. Higher barrier techniques can manipulate that area, space and time as we've seen various curses and sorcerers do. The ultimate form of a BT infused with the essence of your jujutsu is the Domain Expansion.
As seen in the graph, Simple Domain is connected to both DE and CEM, you don't need to be able to expand a domain though to learn simple domain. Hollow Wicker Basket is a SD; the one we see most often is SD New Shadow Style. Among other usages, SD disables a DE's sure-hit inside its range.
Another branch of CEM is the Domain Amplification. DA is a version of a domain expansion where you coat yourself with the space of one. This space is supposed to have the user's cursed technique embedded into it but because that CT is absent, the CT of the opponent gets sucked into it to become neutralized. Not just the sure-hit but the entire technique is affected by DA.
From CE we go to Innate Technique. That one is divided into Inherited and Non-Inherited Technique. What's missing here is Acquired Technique like Yuji's Shrine and Blood Manipulation. Those 4 things describe the same thing e.g. Anti-Gravity System or Strawdoll Technique. An IHT is one that is passed down, a NIT is one that appears out of nowhere for the first time.
Cursed Technique Lapse describes any application of an Innate Technique as long as it's done with cursed energy. E.g. Resonance and Hairpin are the CTLs of the Strawdoll Technique just like Blue is the CTL of Limitless.
From CEM we can go to the Reverse Cursed Technique. That's the process of creating Positive Energy from CE by multiplying it with itself. PE automatically heals a human but is poison to curses.
If you can create PE you can also learn to channel it into your Innate Technique, this gets you Cursed Technique Reversal. In the entire manga, we only saw only two applications of CTR: one is Red from Limitless and the other Gravity from Anti-Gravity System.
If a sorcerer can use both CTL and CTR, they can also learn to use the Extension Technique. We only ever saw one sorcerer use that so most people would know it more under Hollow Technique, in this case Purple. (I don't know if Hollow Technique is the unique name of Purple or if it's synonymous with Extension Technique.)
What's missing is the Maximum Technique like Jogo's Meteor, simple Shikigami and Binding Vows to make the ability tree complete.