Thunder Katana - Project Slayers 2 Wiki
How to get the Thunder Katana from Zentaro, its V2 upgrade path and its damage profile.
Overview
The Thunder Katana drops from Zentaro, the boss known as the Thunder King who also trains Thunder Breathing. Like every other boss weapon in the game it sits at a flat five percent, so expect several kills before it lands. The encounter is the same one you meet while unlocking the style.
Thunder is a burst style rather than a sustained one, which is why its katana suits players who like closing distance fast and punishing a mistake. Community testing places Thunder Breathing at the top of PvP ladders. Read the Thunder Breathing page before you commit materials to the blade.
Zentaro Fight and Drop
This guide covers the Zentaro fight from approach to drop, and shows how the Thunder moveset pairs with the katana once you have it. Watch the boss tells around the gap-closer, because that window decides your clear speed. Read the Zentaro page alongside it.
Farming the Thunder Katana
Getting the katana is a two-part job: unlock the style, then farm the boss who owns the drop. The Thunder trainer and the drop source are the same character, so the unlock trip doubles as your first introduction to the fight. Our trainer locations page covers the approach.
Because the rate is five percent, volume beats caution. Find the fastest route to the boss, clear it, reset and repeat, and bring friends so each attempt costs less time. The fast leveling methods page explains how to keep those loops tight.
Learn Thunder Breathing
Reach the Thunder trainer gate and unlock the style so the katana has a moveset to scale with.
Travel to the boss
Head to Zentaro near Windy Peak, below the Obanai area by Hidden Mist, and confirm the spawn point.
Farm the drop
Defeat Zentaro repeatedly until the five percent Thunder Katana drop lands in your inventory.
Reforge it
Take the katana to Togane once the forge is unlocked and push it into V2 with the usual materials.
Thunder Katana at a Glance
Nothing about this weapon is secret, which makes it one of the cleaner farms in the game. The boss is reachable early, the rate matches every other katana drop, and the upgrade path follows the standard forge route. See the full drop table for comparison.
The upgrade itself follows the same rules as every other blade in the game, so there is no special Thunder-only material to hunt. Bring the katana, its schematic and the usual ore, scrap and thread once the forge is open. Our V2 forging guide lists the full requirement set.
| Detail | Value |
|---|---|
| Weapon | Thunder Katana |
| Drop source | Zentaro |
| Drop rate | 5% |
| Boss title | Thunder King |
| Location | Near Windy Peak by Hidden Mist |
| Also known for | Thunder Breathing training |
| Upgrade path | V2 reforging with Togane |
| Style pairing | Thunder Breathing |
How It Plays
Thunder Breathing is built around short, violent exchanges. The style is rated S-tier for PvP in community testing, largely because Thunderclap and Flash closes distance instantly and turns a neutral fight into a punish. That identity carries straight into how you use the katana.
Because the boss doubles as a trainer, the fight is familiar territory for anyone who already learned the style. Zentaro sits below Obanai near the Hidden Mist area, close to Windy Peak, and the trip becomes routine after a few attempts. More detail lives on the Zentaro page.
A five percent drop is not a rare chase, so the real question is whether the blade earns a slot in your build. If Thunder is your main style, upgrade it and pair it with damage accessories. If it is a side project, a reforged drop you already own may be the smarter equipment choice.
Farm Checklist
Every part of this farm is already in the game, so the checklist below is short. Confirm the style first, then reach the boss, pull until the drop lands, then upgrade. Nothing here requires an event or a limited-time window.
Thunder katana
The drop itself, a five percent reward from the Thunder King encounter.
Zentaro
Boss and Thunder trainer, found near Windy Peak below the Obanai area.
V2 upgrade
Standard reforging at Togane's forge using the usual endgame materials.
Burst playstyle
Built for closing distance fast and punishing recovery frames in PvP.
Farming Tips
Stack the Thunder grind with everything else you are doing near Windy Peak and the Hidden Mist area. The region already hosts quest steps, trainers and other bosses, so one trip can serve several goals at once if you plan the route.
Once the katana is in hand, treat the V2 step as the real finish line. The base drop is only the entry ticket, and the reforged version is what carries you through later content. Materials come from the same dungeon loop as every other weapon upgrade.
- Unlock Thunder Breathing before you start the farm.
- Learn the boss tells around the gap-closer attack.
- Bring a group so each five percent roll comes faster.
- Combine the trip with nearby quest steps.
- Reforge the katana as soon as the forge is unlocked.
Frequently Asked Questions
How do you get the Thunder Katana?
Defeat Zentaro, the Thunder King, near Windy Peak below the Obanai area. The katana is a five percent drop, so expect multiple attempts before it finally appears.
What is the Thunder Katana drop rate?
It is five percent, matching every other named boss weapon in the game. Only the Stone weapon sits lower, at one percent.
Who is Zentaro?
Zentaro is the boss titled the Thunder King and the trainer who teaches Thunder Breathing. He is found near Windy Peak, below the Obanai area close to Hidden Mist.
Does the Thunder Katana have a V2 version?
Yes. Once the forge is unlocked it reforges like any other katana, using the prerequisite weapon, a schematic and the usual endgame materials. See the forging guide for requirements.
Is Thunder Breathing good for PvP?
Community testing rates Thunder Breathing as S-tier for PvP, built around burst damage and the Thunderclap and Flash gap-closer. It rewards fast, decisive engagements rather than long trades.
Can I use the Thunder Katana with another style?
You can carry it, but the weapon is designed around Thunder Breathing, so a different style loses most of the synergy. Farm a katana that matches your trained style instead.
How long does the Thunder Katana take to farm?
That depends entirely on luck, because the rate is fixed at five percent. With a fast route and a group clearing quickly, most players finish within a handful of sessions.