What to know
- Mysteries of Onmyo Magic is a secret skill available late in the Bakumatsu era.
- Purchase it from a Sudama merchant near Nijo Castle Ruins shrine using special wares.
- It gives a 30-50% chance for Onmyo talismans to cast for free, excluding summons.
- Pair it with magic builds to keep buffs and damage flowing endlessly in boss fights.
In Nioh 3, you can unlock the power of Onmyo Magic in Nioh 3 with Mysteries of Onmyo Magic, a top skill that lets you cast talismans without spending uses. Head to the Bakumatsu era in 1864 CE to grab Mysteries of Onmyo Magic, one of the strongest tools that can turn the tide in tough encounters by making your talismans last far longer without extra costs.
| Aspect | Details |
|---|---|
| Era/Region | Bakumatsu (1864 CE), Nijo Castle area |
| Acquisition | Buy from Sudama at Nijo Castle Ruins shrine |
| Currency | Special wares (Yokai-related items) |
| Effect | 30-50% chance no-use Onmyo talismans (buffs/damage, not summons) |
| Best For | Magic builds, sustained boss damage |
How to acquire Mysteries of Onmyo Magic
Reach the later stages of the game in the Bakumatsu era to access this skill easily.
Step 1
Progress through the main story until you unlock the Nijo Castle Ruins fast travel point.

Step 2
Fast travel to Nijo Castle Ruins shrine and look right next to it for the Sudama merchant.

Step 3
Interact with the Sudama and select its special wares to purchase the Mysteries of Onmyo Magic skill text.

Step 4
Pray at the shrine to learn the skill from the text, then equip it in your skill loadout.

Why Onmyo Magic dominates Onmyo builds
This skill shines by giving your talismans a solid chance to activate without consuming a use, keeping your Onmyo gauge ready for constant action.

You will notice it triggers reliably at 30 to 50% rates during testing, perfect for chaining buffs like barriers or damage amps. In boss fights, it lets you maintain pressure without pausing to recharge, making magic feel unstoppable when luck aligns.
Rewards overview
No direct loot drops with this skill, but its passive effect delivers ongoing value through free casts.
| Reward Type | Benefit |
|---|---|
| Skill Effect | Free talisman casts (30-50% chance) |
| Build Synergy | Endless Onmyo buffs/damage in combat |
| Combat Impact | Sustained output vs. bosses/yokai |
Mastering your Onmyo setup
Equip Mysteries alongside high Magic stat gear and cores that boost talisman power. Test it in missions to feel the free-cast rhythm, and combine with passives that expand your Onmyo capacity for non-stop dominance.
Prioritize Mysteries of Onmyo Magic if you run an Onmyo build—it transforms limited talismans into a relentless force.