Iaido Katana
Two katanas built around the perfect parry, which draws and strikes back on its own. Iaido-inspired cuts, an iai stance with a scabbard, tree chopping and a Zenitsu-style Thunderclap dash.Iaido Katana
Two katanas that win on the parry. Every perfect parry draws the blade and strikes back on its own.
Inspired by real iaido, the art of drawing and cutting in one motion, and by Zenitsu's Thunderclap and Flash from Demon Slayer.
Please report bugs on GitHub.
Features
- Counter. A perfect parry staggers the attacker, and the katana draws and strikes back for 3 times its damage. The same cut sweeps 170 degrees around you up to 4 m and hits every other enemy for double damage. Parried projectiles send half of the counter back. The katana barely blocks, so only a perfect parry stops a hit.
- Parry window. 200 ms (vanilla 250), or a precise mode with 150 ms and 15% stronger counters, each player's own choice. A katana parry never staggers you.
- Iai stance. The katana rests sheathed at the left hip and is drawn by the parry. After fighting it is flicked clean (chiburi) and slowly sheathed (noto).
- Iaido cuts. Full-body animations: a draw cut from the scabbard (nukitsuke), an overhead cut (kirioroshi) and a downward diagonal cut (kesagiri), each with a slow windup and a lightning-fast strike.
- Animation recovery. Lost custom-animation overrides can rebuild, and interrupted attacks release the katana's animation speed safely.
- Steel heavy attack. Raised into a high stance (jodan) while a golden glint climbs the blade, then one huge cut straight down for 6 times the damage.
- Flametal Thunderclap. The heavy attack crouches for 2.25 s while lightning gathers in the hands, then dashes 13 m along a 4 m wide path. Every enemy on the way, and just in front of where the dash ends, takes 10 times the damage, and nothing hits you during the dash.
- Chopping. The counter's cut, the Steel heavy attack and the Thunderclap fell trees, logs and stumps like an axe.
- Effects. Golden (Steel) or blue-white lightning (Flametal) afterimages of the counter, the heavy attack and the Thunderclap, which other players with the mod see too. A landed counter flashes as an ink picture with a short freeze, only on your screen.
Crafting
| Katana | Cost | Station |
|---|---|---|
| Steel Katana | 50 Iron, 100 Coal, 20 Fine Wood, 10 Linen Thread | Forge level 4 |
| Flametal Katana | 50 Flametal, 20 Ashwood, 5 Asksvin Hide, 1 Iolite | Black Forge level 3 |
Upgrades per level: Steel 10 Iron, 20 Coal, 3 Linen Thread. Flametal 10 Flametal, 2 Asksvin Hide (twice that for level 3, four times for level 4). Both can be refined past level 4 at the Forge of Potential with a Battle Idol, like the game's own swords.
Stats
| Steel Katana | Flametal Katana | Black Metal sword | |
|---|---|---|---|
| Damage | 38 slash | 60 slash, 15 lightning | 95 slash |
| Chop | 50, tier 3 | 60, tier 4 | |
| Block | 10 | 13 | 39 |
| Parry bonus | 13x | 13x | 2x |
| Stamina, swing and heavy | 16 and 40 | 20 and 100 | 14 and 28 |
Config
The file is BepInEx/config/onononoki.Iaido_Katana.cfg. Gameplay settings are synced from the server. Settings marked "yours" are each player's own.
| Setting | Default | What it does |
|---|---|---|
Counter.DamageMultiplier |
3 | Counter damage on the parried attacker, times the katana's damage |
Counter.AreaHit |
true | The counter's cut also hits the other enemies in reach |
Counter.AreaDamageMultiplier |
2 | Their damage, times the katana's damage |
Counter.AreaAngle, AreaRange |
170, 4 | Width in degrees and reach in meters of the counter's cut |
Counter.HeavyDamageMultiplier |
6 | Heavy attack damage, times the katana's damage |
Chop.Enabled |
true | The counter, the Steel heavy and the Thunderclap chop trees |
Parry.PreciseMode |
false | Yours. 150 ms window, stronger counters |
Parry.NoStagger |
true | A katana parry never staggers you |
Impact.ParrySoundVolume |
1 | Yours. Volume of the parry sound, 0 turns it off |
Impact.OwnParrySounds |
true | Yours. Your own .wav files in BepInEx/config/Iaido_Katana/ParrySounds play on a parry, one at random |
Thunderclap.Distance, Width |
13, 2 | Dash length and half its width in meters |
Thunderclap.DamageMultiplier |
10 | Damage to each enemy on the way |
Thunderclap.Afterimage |
Path | Yours. What the dash leaves behind, Path (a streak along it), Arc (an arc in front of its end), Both or Off |
Stance.Enabled, Impact.*, Visual.* |
Yours. The stance, the impact frame and the effects | |
Swing.CustomAnimations |
true | The katana's own animations, false for older ones borrowed from Krom and Stagbreaker |
Debug.LogCounters |
false | Yours. Logs attacks and animation diagnostics for troubleshooting |
Installation and compatibility
Use a mod manager, or put Iaido_Katana.dll into BepInEx/plugins. Requires BepInExPack Valheim and Jotunn. For multiplayer, install it on the server and on every player. Only katanas change, every other weapon, block and parry stays vanilla.
Feedback and bug reports
Found a bug or have an idea? Open an issue on GitHub. The source code is in the GitHub repository.