Domain Expansion is the most supreme technique of any jujutsu user. It is achieved by expanding one’s innate domain with cursed energy while using a barrier to construct it inside a separate space. The caster then imbues their cursed technique within the barrier to complete the expansion, allowing them to deploy their ability all throughout the domain.
Domain Basics
All domains are different from each other, varying in their hand signs or techniques. However, they all tend to follow the same base rules unless otherwise stated.
Expanding Your Domain
All domains require a specific hand sign for their expansion to be activated, taking a Full Turn Action (Action + Bonus Action + Movement) to activate. All domains cost 20 Cursed Energy unless specified, and trap all creatures of your choice in a 175-foot circle centered on you, creating a barrier for 1 minute. The insides of a domain expansion vary from user to user, since it’s like showing your soul to your opponents. Outside of your domain, its appearance is of a giant black sphere floating in the air.
All creatures outside your domain will receive Xd6 bludgeoning damage(X = CE modifier) and be pushed to the edge of the barrier. They received an additional 1d4 bludgeoning damage per object they collided with as the domain pushed them. In case the domain forces them against a wall, they must start holding their breath until the domain is closed or shrunk. Your barrier has domain hit points equal to 10 times your CE modifier and is vulnerable to damage from the outside and resistant to damage from the inside. Work with your GM to determine the environment and terrain of your domain.
Technique Burnout
Even if the barrier or the environment isn’t fully formed, casting domain expansion will cause the user’s innate technique to become unstable for a short time afterward. Right after ending your domain expansion, you cannot use any innate technique features and gain 2 levels of exhaustion for 1 minute or until you land a black flash.
Lethal Domains
Domains that are expanded to be lethal are constructed within a barrier imbued with the user’s cursed technique. The caster’s abilities are amplified and any cursed techniques deployed within the domain are guaranteed to hit their target. This sure-hit factor is derived from the barrier’s embedded technique, which is what makes this type of domain considered lethal.
Sure Hit Effect
While inside your domain radius, all of your innate techniques will be affected by a sure hit effect. No matter what your cursed energy attack roll is, it will be considered a hit. Creatures will automatically fail saving throws for your innate technique. This and any other effects of your domain only apply to targets that you choose inside it.
Non-Lethal Domains
In the past, Domain Expansion was a more common technique because domains weren’t constructed to be fatal. They only forced targets inside to obey the rules of the embedded cursed technique. In exchange for lacking a guaranteed hit, a Non-Lethal Domain has one of the following:
Peace Treaty
While inside Non-Lethal domains, no kinds of violence or harmful action is allowed while a condition is not completely followed through. After the condition is completed, the domain will end.
Anti-Domain Clash
Because your domain has a peaceful condition, you cannot open it while another domain expansion is active, however lethal domain expansions cannot be opened as a reaction to your domain opening. You can use your reaction to open your domain against a lethal domain, in which case the clash is different. The domain with more refinement points instantly destroys the other. In the case of two non-lethal domains opening, the one with more refinement points will instantly win.
Domain Refinement
As with every technique, Domain Expansion gets better with refinement and specialization. A refined domain and a normal domain are very different, while in the second case, most semi-grade 1 or above sorcerers could escape, a refined domain can bring trouble to even special-grade sorcerers.
Refinement Points
The longer you refine your domain, the more refinement points you have. You start out with 1 refinement point, which defines many things about your domain. Your refinement limit is 1000 refinement points, only the elite of the elite have ever reached said point.
Refinement Benefits
The more you refine your domain, the more versatile you can make it. Depending on your refinement points, you gain the following:
| Benefit | Description | Refinement |
|---|---|---|
| Domain Durability | Your domain will increase in its durability the more refined it is. Your domain hit points are increased by +1 per refinement point you have. | 1+ |
| Barrier Resistance | The stronger the barrier of a domain on the inside, the weaker it is on the outside. You have realized this, and have found ways to get around it. As part of expanding your domain, you can decide if you want to make your barrier have vulnerability on the inside in exchange for it being resistant to all damage on the outside. In addition, you can spend additional 5 cursed energy when expanding your domain to make it perfectly balanced, making both outside and inside have no vulnerabilities or immunities. | 100 |
| Quicker Expansion | Through training, you have learned how to use your domain hand signs with more efficiency. Your domain now costs an action instead of a Full-Turn Action. | 200 |
| Increased Potency | While inside your domain, your techniques are at their strongest. While inside your domain, your cursed techniques and domain damage if any have additional dice equal to your Cursed Energy modifier. | 300 |
| 0.2 Second Expansion | You have learned how to expand your domain so quickly that almost no one can react to it. As part of opening your domain, you can make it last only until the end of your turn. The cost for this domain expansion is halved, and it cannot be reacted to unless the creature has a higher Dexterity score than your CE score. When opening your domain this way, all creatures are targeted by its effects, too fast to choose. | 400 |
| Lasting Domain | With great practice, you have learned how to make your domain last far longer than it normally would. Your domain now lasts for 2 minutes instead of 1. | 500 |
| Domain Amplification | You have learned how to utilize the power of a domain without actively using it. As an action for half as much Cursed Energy your domain requires, you can cover your body to “wear” your domain in order to neutralize cursed techniques for 1 minute. Once activated, you automatically negate any defensive technique, offensive technique, or spell that affects you, and you can bypass barriers such as infinity with melee attacks. You will also negate a domain’s sure hit effect if you’re inside one. In addition, you can not use your Innate Technique unless you dismiss Domain Amplification as a bonus action. Even if you dismiss it, for the minute you can reactivate it as a bonus action without spending the cursed energy again. This technique does not work against techniques on Maximum Output if the user has 51 or more higher refinement than you. If they are within 50 refinement of you, you have resistance to their technique, and if they have 51 or less refinement than you, you are immune to their techniques even if they use Maximum Output. | 600 |
| Efficient Expansions | It is no secret that opening and maintaining a domain is a very complicated job, requiring lots of cursed energy quantity, practice, and refinement. You have refined this with training, reducing your domain expansion cost by your Cursed Energy modifier. In addition, you only gain 1 level of exhaustion after your domain. | 700 |
| Durable Barrier | Your domain barrier has become hard and quite unbreakable, making escape or forced entry almost impossible. Your domain will gain immunity to non-magical damage from both sides, however, it will still be resistant to all damages from the inside and vulnerable to all damages from the outside. In addition, your domain’s refinement points are doubled when calculating your domain’s hit points. | 800 |
| Compression | You have found a method to make your domain take up less space while making it harder to hit from the outside. As a bonus action while on your domain, you can spend 5 cursed energy to compress it, making the outside become a small circle of 5ft. Inside, however, will be the same size. Attack rolls against your domain on the outside are made with disadvantage, while barrierless domains must use this feature to target your domain on the outside. This lasts until the end of the domain. | 900 |
| Total Mastery | You have reached the pinnacle of Jujutsu, mastering domain expansion. You have mastered your domain hand signs and can expand your domain as a bonus action instead of an action. You can reduce your domain expansion’s cost by your proficiency bonus. While inside the domain, techniques that use an action can now be used as a bonus action, and techniques that take a bonus action can be used as a free action. Your domain now lasts for 3 minutes. | 1000 |
If you have RCT and Domain Refinement of 750 or higher, you gain:
Burnout Recovery. You have realized the complicated issue of Technique Burnout can be solved in a simple fashion. Substitute your brain for a new one! Whilst under the effects of Technique Burnout, you can spend 4 cursed energy as a reaction to regain your Cursed Technique and remove the exhaustion from Burnout. You must succeed on a DC 5 Constitution saving throw. On a success, you remove Burnout without major consequences. On a failure, your eyes and nose start to bleed profusely as you take 8d6 psychic damage and cannot take actions or bonus actions until the start of your next turn. The Constitution saving throw DC increases by 5 for every success, being reduced by 5 for every minute that passes and resets on a long rest.
Methods of Refinement
There are multiple ways of refining your domain, from training with yourself to clashing with other people’s domains. Below is to list of how to gain refinement points:
| Method | Description | Rewards |
|---|---|---|
| Training | Probably the slowest method, but every little progress counts. Once per day, you can spend a number of Cursed Energy up to your Cursed Energy modifier to add to your refinement level. This Cursed Energy can only be regained the next day. | X |
| Domain Casualties | One of the quicker methods of refining your domain is to destroy opponents with your cursed techniques while inside it. If you reduce a creature to 0 hit points while it’s inside your domain expansion, you will gain refinement points. The refinement points are only gained if the creature’s CR was at least half of your level(rounded up). | 20/Creature |
| Domain Superiority | Subjugate another with your own. If you win in a domain clash, you gain refinement points from your domain superiority. You can only benefit from this once per month and not against the same creature. | 100 Points |
Weak Points
All kinds of barriers have a weak spot, domain expansions could not be different. You can only deal damage to a domain’s hit points once you’ve found its weak spot unless you’re outside the domain.
From Inside
Breaking a barrier from the inside is almost impossible, even if you do find the weak point of the barrier you’ll still be targeted by the domain’s constant effects. To break a domain from the inside, you must find its weak spot first by making a DC 30 Perception check. On a failure, the target cannot find a weak spot. On a success, you will find the domain’s weak spot, now being able to target it for your attacks. The barrier has resistance to damage when attacked from inside.
From Outside
While breaking a barrier from inside is nearly impossible, breaking from the outside is a much easier task. You can normally target the domain with attacks. It automatically fails any saving throws, and is vulnerable to all damage other than psychic.
Forming a Weak Spot
Sometimes, even though it may seem like a disadvantage, you can forcefully enter a domain expansion by creating a weak spot, generally a hole of some sort. After you have reached at least 1/3rd of the domain’s maximum hit points, you can take an action to make a Strength, Charisma, or Wisdom saving throw to forcefully open the domain. On a success, you will form a 10 ft by 10 ft hole in the domain that allows you and any creatures to enter inside the domain while you are concentrating. The moment any creature enters the domain they suffer the effects of the sure-hit.
Domain Clashes
Two domains expanding at the same time cause a domain clash, a battle solely defined by who has the most refined domain and talent as a sorcerer.
Domain Clash
When a creature expands its domain, you can use your reaction to expand your own domain as well. The domain battle will be defined by the one with the most refinement points, being the defining factor in deciding the winner. However, even if you do have refinement points to destroy the opposing domain it will take a number of rounds equal to the amount of refinement points that you have above the opponent’s domain. See the table below to see how much rounds it takes:
| Refinement Points Above | Rounds Needed |
|---|---|
| 10 | 9 |
| 20 | 8 |
| 30 | 7 |
| 40 | 6 |
| 50 | 5 |
| 60 | 4 |
| 70 | 3 |
| 80 | 2 |
| 90 | 1 |
| 100+ | 0 |
During a domain clash, the sure-hit effect of both domains will be negated. The domain clash creates a 350 foot area, where 175 feet of it will be within one domain’s area while the other 175 feet is for the other’s domain. The loser’s domain area will shrink by 15 ft per round passed. Once you break the enemy’s domain, your sure-hit effect immediately resumes.
Equal Refinement Clash
Although an extremely unlikely scenario. When two Domain Expansions of equal refinement clash, they completely nullify each other, not being able to overpower or be overpowered, so it’s up to the two sorcerers to maintain their domain while bringing the opponent’s down. As soon as one of the domain casters reach 1/3 (rounded down) of their maximum hit points they need to succeed in a DC 15 roll with no modifiers to maintain concentration on their domain. On a success, the domain is kept stable and they can keep going. On a failure, their domain breaks, giving in to the opponent’s, and they suffer the after effects of Burnout from Domain Expansion.
Multiple Domain Clashes
A battle of two domain expansions is already hard to describe, now one of three or more is simply chaotic. When three or more domains are involved, the rules are the same, with the domains with less refinement being destroyed as soon as the necessary rounds pass. The barrier is expanded by 175 ft per domain involved, with the weaker domains getting reduced by 15 feet at the beginning of each round.
Barrierless Domain
You have refined your domain expansion to new levels, making it become a true work of art. This can only be achieved by experiencing a breakthrough after reaching 1000 refinement points.
Different Properties
When you expand your domain, you can choose to not set up a barrier and remove the time limit. Your domain expansion range increases to 655 feet, and it has a center at the middle. Your domain cannot be destroyed unless you receive 1/3rd of your maximum hit points in one instance, in which you must make a Constitution saving throw DC15 + half the damage. On a failure, the domain is destroyed. Your techniques still have a sure hit effect, however due to not having a barrier your domain is much simpler to escape. Also on a domain clash, your domain effects and cursed techniques can target the outside barrier of the other domain directly.