Mastery, Demon Progress and reputation
Your level is not the only number that grows. Each power and each weapon type has its own mastery bar, and mastery is what opens your next move. Demons also fill a Demon Progress bar with souls, and everyone carries a reputation that goes up or down with every kill.
Two bars at the bottom right
Next to the hotbar sit two bars: one for your power (a breathing style, blood art or fighting style) and one for the weapon in your hand. Every katana shares a single Sword Mastery bar; axes and maces, tantos and sickles each get their own. There is no fishing bar: fishing progress comes as titles instead.
Each level asks for 30 times its own number. That rule is ours, worked out from the bars below, and every reading we have fits it.

A Mizunoto kill: +61 Exp +27 Wen +90 Water and +108 Sword Mastery -9 Reputation. Bottom right, the two bars: Sword Mastery Lv 64 1831 / 1920 and Water Mastery Lv 61 285 / 1830.
Frame at 1:21 of The Best Method To Farm Mastery In Project Slayers 2, recorded by Ishiken — a player’s video, not an official image
| Bar on screen | Level | Needs |
|---|---|---|
| Wind Mastery | 17 | 510 |
| Water Mastery | 61 | 1,830 |
| Sword Mastery | 64 | 1,920 |
| Sickles Mastery | 114 | 3,420 |
| A demon's bar | 126 | 3,780 |
Which move needs which mastery
| Key | Mastery | Skill points | Also |
|---|---|---|---|
| Z | none | 3 | Open once training is done |
| X | 14 | 6 | |
| C | 27 | 9 | |
| V | 40 | 12 | |
| B | 53 | 15 | Also Defeat <boss> and that boss's skill item |
These numbers are read across the Stone, Insect and Wind trees, though not every cell appears on every tree; each step is 13 more. A move stays struck through with REQUIREMENTS NOT MET until all of them are true. So when a friend has a move you lack, check the three things in turn: the mastery on that power’s bar, your spare skill points, and for the ultimate, the scroll from its boss. Which boss drops which scroll is on the bosses page, and the trees themselves are on each breathing style page.
We have not seen the node text on a blood art or weapon tree yet, so their numbers may differ.

Purifying Claws: Skill Points 6, Mastery 14, REQUIREMENTS NOT MET. The bank shows 12 SKILL POINTS, so mastery is what is missing.
Frame at 17:15 of Going From NOOB TO WIND BREATHING SANEMI SHINAZUGAWA In Project Slayers 2 (Roblox), recorded by XenoTy — a player’s video, not an official image
How far to your next move
Type the level and the first number on the bar you want to raise. From a fresh bar, mastery 53 is 41,340 points: about 77 Gyorei kills without a boost.
To reach mastery 53
41,340 points
About 77 kills at 540 each. Each level asks for 30 times its number, so the last levels cost the most.
What each kill pays
Every kill toast lists mastery next to Exp and Wen, marked with a small red box. One kill feeds both bars. Sometimes the toast gives one number for both, sometimes a number each, and nobody has worked out why.
| Kill | Playing as | Mastery in the toast | Reputation |
|---|---|---|---|
| Gyorei (Hashira) | Demon | +540 Blood Manipulation and Sickles Mastery | -120 |
| Mizunoto | Slayer | +90 Water and +108 Sword Mastery | -9 |
| Mizunoto | Demon | +41 Sickles Mastery | -9 |
| Thunder Trainee | Demon | +108 Blood Manipulation Mastery | not in the toast |
| Hoyuzo Subordinate | Slayer | +34 Axe and Mace and Stone Mastery | +8 |

A demon kills Gyorei: +1,000 Exp +450 Wen +540 Blood Manipulation and Sickles Mastery -120 Reputation, plus the hunt's +3,300 Exp +1,485 Wen.
Frame at 2:26 of How to Get MAX MASTERY Fast! | Slayer 2, recorded by Ashira RBX — a player’s video, not an official image

The same kill with the boost on: +1080 Sword Mastery (2x Mastery) -120 Reputation. The creator's webcam is cropped off.
Frame at 14:29 of Gyomei Is The STRONGEST!? Mastering STONE Breathing In One Video (Project Slayers 2), recorded by imCosmi — a player’s video, not an official image
2x Mastery doubles the number and says so in the toast: 540 for Gyorei becomes 1,080. It lasts 30 minutes and costs 10 Ore, or 150 Robux (120 for Roblox Plus members). The other boosts sit in the same in-game shop.
Tower points from Ouwigahara buy mastery too: the Tower Crystal in the hub sells it at 3,000 points for any power or weapon you own. The stall does not print how much you get; the creator noah says one level.
At level 225, the cap, the crow list we saw pays in the mastery box instead of the Exp book, and a high-level hunt list in Muzan’s lair does too. At level 188 they still show the book. The leveling page covers the climb to 225.

At level 225: four rows read Max level is 125, and Defeat Reaper pays 2,100 with the red mastery icon, not the Exp book, and 1,890 Wen. The clock and chat are the streamer's overlay.
Frame at 0:45 of How To Get MAX MASTERY FAST Project Slayers 2, recorded by Corgi — a player’s video, not an official image
Maxing a bar
Max out a power and you earn its title. Thunder’s is Thunder Perfected, an Epic title that lists a 1.02x breathing damage buff. The Titles menu has a Powers group of 17 and a locked Arrow Perfected, so each power seems to have one.
Where the bar stops is not on any screen we have. The creator KoujiEX and a player on r/Slayers2Roblox both put it at 400. From level 1, that would be 2,394,000 points.
What mastery adds to your own stats per level has not been shown either. One Reddit player guesses about 20 extra M1 damage at full mastery, and hedges it.

Thunder Perfected, Epic: Reach max mastery with Thunder Brea.., 1.02x (Breathing Damage Factor). The categories include Powers (17). The green clock is the streamer's overlay.
Frame at 0:10 of How To Get MAX MASTERY FAST Project Slayers 2, recorded by Corgi — a player’s video, not an official image
Demon Progress: the demon’s version of the gourd bar
Slayers raise Slayer Progress with gourds. Demons get a bar of their own in the same menu, under Player Info / Progression, and fill it with souls. It has four levels. Level 2 needs 3,000; the other thresholds have not been on screen.

Player Info / Progression, Lv 145 Demon: Demon Progress Lv 2 13 / 3000, adding +50 Max Health +0.2 Illumination +0.05 Max Health Factor. The toast above reads +25 Demon Progress Lv 1 → Lv 2 +2,000 Exp +1,800 Wen.
Frame at 1:22 of Slayers 2 How To Get MAX DEMON PROGRESS Fast + Full Guide! (NEWCODES), recorded by Builderboy TV — a player’s video, not an official image

Demon Progress Lv 4 (Max): +100 Max Health +0.08 Max Health Factor +0.04 Evil Art Damage Factor +2 Additional Damage +0.15 Illumination.
Frame at 2:46 of Slayers 2 How To Get MAX DEMON PROGRESS Fast + Full Guide! (NEWCODES), recorded by Builderboy TV — a player’s video, not an official image
Souls
Weak Soul+5
Small animals such as a Bear Cub
The +5 comes from the creator’s caption, not the game.
Strong Soul+10
Mizunoto; one sits on Mother Bear
Brave Soul+25
Hashira such as Gyorei, and some chests
Press T by a soul to claim it. Builderboy TV farms the Mizunoto camp: each one leaves a Strong Soul, and he says they respawn in 10 to 15 seconds. 2x Souls doubles that to 20 for 30 minutes, at 7 Ore or 100 Robux (80 for Roblox Plus members).

Builderboy TV zooms in on the Ore shop: 2x Mastery (30m) 10 and 2x Souls (30m) 7, beside 2x EXP (30m) 14.
Frame at 2:58 of Slayers 2 How To Get MAX DEMON PROGRESS Fast + Full Guide! (NEWCODES), recorded by Builderboy TV — a player’s video, not an official image

An opened chest: T Brave Soul Claim. More soul orbs float around it.
Frame at 0:48 of Slayers 2 How To Get MAX DEMON PROGRESS Fast + Full Guide! (NEWCODES), recorded by Builderboy TV — a player’s video, not an official image

Mizunoto kills with the boost: +41 Sickles Mastery -9 Reputation each, +20 Demon Progress (2x Souls), and Lv 3 → Lv 4 +12,000 Exp +10,000 Wen. A Broken Nichirin Katana drops too.
Frame at 4:12 of Slayers 2 How To Get MAX DEMON PROGRESS Fast + Full Guide! (NEWCODES), recorded by Builderboy TV — a player’s video, not an official image
| Level up | Exp | Wen |
|---|---|---|
| Lv 1 → 2 | 2,000 | 1,800 |
| Lv 2 → 3 | 5,000 | 4,000 |
| Lv 3 → 4 | 12,000 | 10,000 |
Level 4 adds health, 4% evil art damage, 2 flat damage and some Illumination, but no skill: demons have nothing like the Slayer’s Breathing Boost. The Illumination figure dropped from 0.2 at level 2 in an early build to 0.15 at level 4 in a later one, so it may have been cut in a patch. If you are still human, the demon route starts with your reputation.
Where to see your reputation
It is in the Roblox player list at the top right, the one headed People and Reputation. Everyone in the server is listed with their number, so you can see who has been hunting Slayers. None of the videos we checked shows it on a phone.
- Kill a demon (a Hoyuzo Subordinate)+8
- Kill a Mizunoto-9
- Attack civiliansSlowly: one counter read -7, -15, -24, then -33 over about a minute
- Kill a Hashira (Gyorei)-120
- Walk into Muzan's Lair5 evil reputation spent: a negative number moves 5 towards zero
- Reset Reputation from the shopBack to 0
Reset Reputation costs 4 Ore or 50 Robux (40 for Roblox Plus members); the other resets are on the resets page.

Muzan's hunts: Eliminate Gyorei 1,650 1,485, the rest Max level is 125. Top right, the People / Reputation list: Set 3,249 down to popinugeta -70.
Frame at 1:06 of FASTEST Method To Get Max Level/Mastery In Project Slayers 2.., recorded by tana — a player’s video, not an official image

A Slayer kills a Hoyuzo Subordinate: +66 Exp +30 Wen +34 Axe and Mace and Stone Mastery +8 Reputation, and Demon Horns drop.
Frame at 20:26 of All Breathing Trainer Locations & Requirements | Project Slayers 2 Slayers Guide!, recorded by revolver agz — a player’s video, not an official image
Levels 62 to 90: different quests for demons and Slayers
From about level 62 the two sides get different quest givers. Each quest pays Wen at 45% of its Exp, the same rate as the Slayer quests on the leveling page.

Five Broken Blades 1/2: Broken Nichirin Katanas 5/5 done, Return to the Shady Individual 0/1, Exp +1,050 Wen +473.
Frame at 7:54 of How to FULLY MAX out Your Demon in Project Slayers 2..., recorded by Solidz — a player’s video, not an official image
Demon, 62: Shady Individual Rooyi at Seasons Crossing wants five Broken Nichirin Katanas, which Mizunoto drop. 1,050 Exp, 473 Wen.

Demon Delroy in the snow: Thin the Kanoe Ranks 0/1, Kanoe Demon Slayers defeated 0/8, Exp +1,620 Wen +729.
Frame at 9:26 of How to FULLY MAX out Your Demon in Project Slayers 2..., recorded by Solidz — a player’s video, not an official image
Demon, 90s: Demon Delroy in the snow wants eight Kanoe Slayers beaten. 1,620 Exp, 729 Wen. The level on his option has not been shown.

Jugg Chat at the mouth of the cave, and the toast Dreamfall Hollow NEW!. The creator's level label is cropped off.
Frame at 4:48 of COMPLETE 0-255 LEVEL GUIDE! (Project Slayers 2), recorded by SAGEz — a player’s video, not an official image
Slayer, 62: Jugg waits at the mouth of Dreamfall Hollow. Two players on r/Slayers2Roblox say he will not talk to you until you pass Final Selection.
The demon quest for the 75 band has not turned up in any video yet. Until it does, demons fill that stretch with Muzan’s hunts and Mizunoto, which also feeds Demon Progress; the hunts are on the Muzan page.
Watch a mastery farm
How to Get MAX MASTERY Fast! | Slayer 2
Recorded by Ashira RBX on YouTube, a player’s video, not an official one
A demon farming Gyorei, with the mastery and reputation toasts on every kill.