If you are already deep into Dungeon Lootr, Boss Rush is one of the best places to farm for special classes. Unlike normal class spins, Boss Rush gives you a chance to unlock exclusive classes such as Sukuna, Gojo, and Asta.
Sukuna and Asta both take some time to unlock because you need to collect fragments from their Boss Rush routes. The good news is that you can also get lucky and obtain the class item directly from a high-floor run. Here is how the whole process works.
How to Unlock Boss Rush
Boss Rush is an endgame mode and is generally available once you reach around Level 67. You also need a Boss Rush Ticket to start a run.
The mode has 100 floors, with class item drops becoming relevant from around Floor 40 onward. Floor 100 is especially important because the final boss gives the fragments needed for crafting the special classes.
You can play Boss Rush alone or with other players. If you have a friend who is also farming the same class, playing together can make the grind easier.
How to Get Sukuna in Dungeon Lootr
Sukuna is one of the main classes you can farm through Boss Rush. To unlock him through crafting, you need 50 Sukuna Fragments. These fragments are obtained by defeating Sukuna in the Boss Rush route, with Floor 100 being the main farming point.
Once you have all 50 fragments, take them to the Forge and craft the required item for the class. The basic process is:
- Reach the Boss Rush requirement.
- Enter Boss Rush.
- Select the Sukuna boss route.
- Push toward the higher floors.
- Defeat Sukuna and collect the fragments.
- Continue until you have 50 fragments.
- Go to the Forge.
- Craft the Sukuna class item.
Current community guides report around 8–18 fragments from a Floor 100 clear, although the exact amount can vary.
There is also a chance for the actual class item to drop during Boss Rush, so you might unlock Sukuna before collecting all 50 fragments.
Sukuna Skills and Moveset
After unlocking Sukuna, you get a melee-focused moveset based around his well-known abilities.
The moveset is generally solid, but it is not perfect. One weakness is that some attacks do not give Sukuna as much movement as you might expect from the name or animation.
Fuga is one of his strongest attacks and is a major reason to use the class.
Sukuna’s ultimate is Domain Expansion, which gives the class a much stronger finish compared with classes that do not have an ultimate.
Overall, Sukuna is a good choice if you enjoy aggressive melee combat. More mobility and range would make the class even better, but the damage potential is still useful for Boss Rush.
How to Get the Cursed King Title
Sukuna has another reward that gives you a reason to keep using him after unlocking the class.
You can work toward the Cursed King title by reaching maximum mastery with Sukuna. After reaching the required mastery, visit the Sukuna NPC and complete the title requirement.
The title also gives a useful bonus for Sukuna and includes a 1 million Gold reward according to current guide information.
Because of this, the Sukuna grind does not necessarily end when you craft the class. If you like the character, continuing to level his mastery can give you another useful reward.
How to Unlock Asta
Asta uses a similar system to Sukuna, but you need a different type of fragment.
For Asta, you need 50 Asta Fragments. These are earned from the Asta Boss Rush route, with the Floor 100 boss being the main source for the crafting materials.
After collecting 50 fragments, go back to the Forge and craft the Anti Magic class item.
The farming process is simple:
- Enter Boss Rush.
- Choose the Asta route.
- Push toward the higher floors.
- Defeat the Asta boss.
- Collect Anti Magic/Asta Fragments.
- Repeat the run until you reach 50.
- Craft Anti Magic at the Forge.
Just like Sukuna, Asta’s class item can also potentially drop directly during Boss Rush, so you should treat the 50-fragment requirement as the guaranteed crafting path rather than the only way to get the class.
Is Asta Worth the Grind?
Asta is usable, but there are some reasons why players may want to prioritize other Boss Rush classes first.
One major downside is that Asta does not have an ultimate. Compared with Sukuna, this makes the class feel less complete.
The moveset can still deal decent damage, but if your main goal is to spend your Boss Rush Tickets on the strongest options, Sukuna or Gojo may be a better priority.
Asta is still worth collecting if you want the full class collection or simply like the character.
What About Frieren?
Frieren is another class mentioned alongside the Boss Rush unlocks, but she follows a different route.
Instead of farming Boss Rush for her, Frieren is obtained through the Battle Pass. This means you do not need to spend your Boss Rush Tickets trying to get her.
Frieren focuses more on ranged attacks and does not have an ultimate. Her ranged playstyle can still be useful if you prefer attacking bosses from a safer distance.
She also has a mastery-based title, so there is another reason to keep using her after unlocking the class.
Best Way to Farm Boss Rush
The biggest mistake is switching between different boss lanes every run.
If you want Sukuna, keep farming the Sukuna lane until you have the class. If you want Asta afterward, switch to the Asta lane once Sukuna is finished.
This keeps your fragments focused instead of leaving you with several incomplete collections. Community guides also recommend committing to one target because Floor 100 fragment rewards are tied to the boss route you are farming.
Floor skip tickets are also very useful. They can reduce the amount of time spent going through the earlier floors and help you reach the important boss encounters faster.
Before starting a serious farming session, make sure your stats are properly allocated and your gear is upgraded. A badly prepared build can turn every Boss Rush attempt into a much longer grind.
Getting Sukuna and Asta in Dungeon Lootr is not a quick process, but Boss Rush gives you a clear path toward both classes. For Sukuna, focus on collecting 50 Sukuna Fragments and craft the required item at the Forge.
For Asta, do the same with 50 Asta Fragments from his Boss Rush route. Both classes can also have direct class-item drops during higher-floor runs, so you may get lucky before reaching the full fragment requirement.
If you are choosing which one to farm first, Sukuna is the stronger priority based on the moveset, ultimate, and additional Cursed King title. Asta can then become your next target once you have enough Boss Rush Tickets and time for another grind.