Black Flash is one of the most powerful techniques in Heian, available to all players who meet a basic requirement: having Curse Output. This guide covers how to get Black Flash, how to activate it consistently using the red tint mechanic, and tips on chaining it effectively during combat using specific skills and weapons.
What is Black Flash in Heian?
Black Flash is a high-impact attack that dramatically increases your damage when used under certain conditions. Unlike other advanced skills or clan abilities, Black Flash can be accessed by any player as long as their build includes Curse Output, even at the lowest value.
This technique is not something you unlock from a trainer or storyline—it’s a combat-triggered mechanic that rewards aggressive and skillful play.
Requirements to Trigger Black Flash
You do not need a high-level build to access Black Flash, but you do need the following:
Curse Output Stat: Must be greater than 0.
One of These Core Skills:
Divergent Fist
Reinforced Kick
Both of these skills are part of the Core Skill Tree and can be equipped by players who invest in the required stats.
To check whether you have the right skills:
Open the menu (press
M)Navigate to the Core Skill Tree
Ensure you’ve unlocked either Divergent Fist or Reinforced Kick
Also Read: How to Get Calamity Fist in Heian
How to Activate Black Flash (Red Tint Mechanic)
The most important condition to use Black Flash is the red tint effect that appears on your screen.
How It Works:
Red tint appears after you deal and take damage in a fight.
Once the red tint is active, your next use of Divergent Fist or Reinforced Kick can trigger Black Flash, dealing massive bonus damage.
After you use Black Flash, the red tint disappears and must be triggered again through combat.
This makes Black Flash timing-dependent. You must act quickly once the screen turns red or you’ll miss the opportunity.
How to Farm Red Tint Faster
To maximize your chances of using Black Flash multiple times per fight, you need to farm the red tint quickly. The best way to do this is to stay aggressive and trade hits with enemies.
One item that dramatically helps this process is the Calamity Fist.
Calamity Fist Details:
Boosts red tint activation rate when landing heavy hits or critical attacks.
Allows you to build up the red tint bar faster, making Black Flash more accessible in combat.
Requires:
50 Strength
50 Curse Output
If you meet the requirements, Calamity Fist is one of the best weapons for Black Flash farming.
Best Combo Setup for Black Flash
To make the most out of Black Flash, use this simple combo strategy:
Engage in combat – Start fights actively to build red tint faster.
Use Reinforced Kick or Divergent Fist – Make sure it’s ready when the red tint appears.
Wait for the red tint – Once it shows up, unleash your skill immediately.
Repeat – Stay in the fight to refill red tint again and cycle the combo.
This method allows you to reliably trigger Black Flash multiple times per encounter, especially in longer fights or boss battles.
Key Tips for Black Flash Users
You can use Black Flash multiple times, but only once per red tint activation.
Don’t wait too long after the red tint appears—it won’t last forever.
Use Calamity Fist to increase your odds of triggering the mechanic in shorter fights.
Keep moving and attacking to maintain your combat rhythm and build the activation condition faster.
Focus on Strength and Curse Output if you want consistent Black Flash playstyle.
Final Thoughts
Black Flash in Heian isn’t locked behind a clan or hidden NPC—it’s a universal mechanic that rewards fast-paced combat and mastery of timing. With the right build, a little Curse Output, and skills like Divergent Fist or Reinforced Kick, you can land this devastating attack again and again. Equip Calamity Fist if you’re serious about building around Black Flash, and practice staying aggressive to take full advantage of the red tint mechanic.