Osamu "Iron Discipline Ninja" Guide: 4 Star 4 Ice Fighter

Q: What element and rarity is Osamu in Empires & Puzzles?

Osamu is a 4 star Ice hero (blue) with 4 rarity.

Hero Review

Osamu Hero Review: The 4-Star Ninja of Discipline

"Osamu brings the Ninja Tower's charge mechanics to the 4-star arena. With high attack and a defense-down cut, is he the blue sniper you've been waiting for, or just a bench warmer? We break down his triple-charge skill and minion-hating passive."

Read Full ReviewIn-Depth Analysis & Strategy

Special Skill

Iron Discipline Cut

Mana Speed

Charge

1x Mana Charge
* Deals 350% damage to the target.
* The target gets -35% defense for 2 turns.
2x Mana Charge
* Deals 375% damage to the target.
* The target gets -40% defense for 4 turns.
3x Mana Charge
* Deals 400% damage to the target.
* If the attack defeats the target, the caster gains 100% mana. (After a character has received 5 direct mana additions from Special Skill during a single turn, all subsequent direct mana additions done by Special Skills will have reduced power on that character.)
* The target gets -45% defense for 6 turns.

⚡ Tile Breakpoints Guide

Charge 1

4.9Base Tiles

23% Bonus

4Tiles

Charge 2

9.8Base Tiles

9% Bonus

9Tiles

Charge 3

14.7Base Tiles

6% Bonus

14Tiles

Family Bonus

Tower - Ninjas

Bonus for 1/2/3 Unique Heroes:
5%/10%/15% chance to dodge normal attacks and Special Skills
5%/10%/15% chance to counterattack with 60%/90%/120% of the damage received.

Costume Bonus

Bonus Stats

Costume Bonus

🎭

No Costumes Available

This hero does not currently have any costumes released in the game. Costume Bonuses are unlocked by owning and fully leveling up one or more costumes for the base hero.

Passives

Inherent Abilities

Passive Skills

Weaker Minions
Enemy Minions have -50% HP.

Aether Power

Attack Up

At the start of each battle, this Hero gets 20% attack for 6 turns

In battles with multiple waves, the effect is refreshed at the beginning of each wave.

Talents

Class Talent

Master Revive

When receiving a fatal attack, 30% chance to revive at the end of the turn. If revived, the following effects are also activated:

This character gets 25% attack for 2 turns.

Release Date

Hero Information

Release Date

Released On

Sep 24th, 2024

779 days ago

About Release Dates

This shows the release date of Osamu in Empires & Puzzles. This date determines eligibility for various game events like Hero Coach (2 years after base hero release) and Visiting Outfitter (549 days after release for the first costume).

Hero Coach Info

Train Your Hero

Hero Coach Date

🎓

Not Eligible for Coaching

The Hero Coach event is exclusive to 5★ Legendary heroes. Lower rarity heroes are not eligible for instant ascension.

Visiting Outfitter Info

Get this costume

Visiting Outfitter Date

🎭

No Costumes Available

This hero does not currently have any costumes in the game. As a result, they do not appear in the Visiting Outfitter events.

Matching Legendary Troops

status_effect_defense_reduction_legendary_troop

Unstoppable Fighter

Unwavering Cleric

status_effect_attack_reduction_legendary_troop

Swashbuckler Fighter

status_effect_attack_addition_legendary_troop

Battle Master Assassin

These troops provide full Class Synergy bonuses when equipped on Fighter heroes of the Blue element.

Click here to view the full guide on how to obtain and best utilize these powerful troops!

Mana Optimization Strategy

How it works

By default, Osamu has Ninja mana speed, requiring 4.9 tiles to charge. Equipping troops with a Mana Bonus can reach specific Breakpoints — the exact percentages where your tile count drops — allowing your hero to fire their special skill faster, with less tiles. Additionally, as a Fighter, this hero can unlock a +2% Mana Bonus through Emblems (Talent Tree). These bonuses can significantly lower the troop level required to reach these breakpoints.

Standard4.9Tiles

Optimized4.9Tiles

5★ Mana Troop Set

18 Variants Matching

Default14.7 Tiles

Optimized

14Tiles

Required Level

LVL 9

With +2% Emblem Bonus:

LVL 1

Need Bonus:6%

Combined bonuses:+7%

Breakpoint Achieved!

Default9.8 Tiles

Optimized

9Tiles

Required Level

LVL 19

With +2% Emblem Bonus:

LVL 9

Need Bonus:9%

Combined bonuses:+9%

Breakpoint Achieved!

5★ Mana Troop Set

2 Variants Matching

Default14.7 Tiles

Optimized

14Tiles

Required Level

LVL 10

With +2% Emblem Bonus:

LVL 1

Need Bonus:6%

Combined bonuses:+7%

Breakpoint Achieved!

Default9.8 Tiles

Optimized

9Tiles

Required Level

LVL 20

With +2% Emblem Bonus:

LVL 10

Need Bonus:9%

Combined bonuses:+9%

Breakpoint Achieved!

Ravager Warriors

Mana Troop

Default14.7 Tiles

Optimized

14Tiles

Required Level

LVL 5

With +2% Emblem Bonus:

LVL 1

Need Bonus:6%

Combined bonuses:+7%

Breakpoint Achieved!

Default14.7 Tiles

Optimized

13Tiles

Required Level

LVL 29

With +2% Emblem Bonus:

LVL 23

Need Bonus:14%

Combined bonuses:+15%

Breakpoint Achieved!

Default9.8 Tiles

Optimized

9Tiles

Required Level

LVL 11

With +2% Emblem Bonus:

LVL 5

Need Bonus:9%

Combined bonuses:+9%

Breakpoint Achieved!

Veteran Wizard

Magic Troop

Default14.7 Tiles

Optimized

14Tiles

Required Level

LVL 5

With +2% Emblem Bonus:

LVL 1

Need Bonus:6%

Combined bonuses:+7%

Breakpoint Achieved!

Default14.7 Tiles

Optimized

13Tiles

Required Level

LVL 17

Need Bonus:14%

This Troop:+14%

Breakpoint Achieved!

Default9.8 Tiles

Optimized

9Tiles

Required Level

LVL 11

With +2% Emblem Bonus:

LVL 5

Need Bonus:9%

Combined bonuses:+10%

Breakpoint Achieved!

General Information

Hero Name

Osamu "Iron Discipline Ninja"

Rarity
ElementIce
ClassFighter
Mana SpeedCharge
Skill Types
Minions Counters Snipers Debuffers (DEF)Mana Raisers
SourceTower - Ninjas
FamilyNinja Family
Aether PowerAttack Up
CostumeBase
Release DateSep 24, 2024
Availability
Coach:Sep 24, 2026
HA8:Sep 24, 2026

Ascension Requirements

Tier

Food

Materials

Tier 2Ascension Cost

132K

★★

★★

★★

Tier 3Ascension Cost

273K

★★★

★★★

★★

Tier 4Ascension Cost

442K

★★★

★★★

★★★

★★★

Limit Break Requirements

Tier

Materials

Limit Break 1Unlock Cost

★★★★

★★★

LB 1 LevelsTotal Cost

★★★

Limit Break 2Unlock Cost

★★★★★

★★★★

★★★

LB 2 LevelsTotal Cost

★★★★

★★★

Stats & Emblems

Simulation: 0 Emblems

Level				💪
4/70	760	637	1232	701
4/75lb1	826	692	1339	755
4/80lb2	958	803	1552	862

Strategy

Mana Node

Talent Level

Calculated Bonuses

Attack

+225 & +4%

Defense

+72 & +3%

Health

+172 & +3%

Mana

+2%

Resource Costs

Emblems

755

Master

Food

2,620,853

Iron

1,588,878

+18

+15

+36

+15

+3%

+18

+3%

+15

+36

+15

+18

+2%

+4%

+50

Community Feedback

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Overall Grade

Overall performance in the current meta

0v0%

Strong

0v0%

Average

0v0%

Weak

0v0%

Terrible

0v0%

Summon Value

Is this hero worth your gems and tokens?

Yes, Absolutely

0v0%

Only if you’re Pay-to-Win

0v0%

Yes, but only when featured

0v0%

Not Really

0v0%

Not at all

0v0%

Copies to Keep

How many copies are worth keeping and leveling?

None

0v0%

1 Copy

0v0%

2 Copies

0v0%

3+ Copies

0v0%

Limit Break Priority

Priority for applying Limit Breaks

LB2 (Alpha)

0v0%

LB1

0v0%

None

0v0%

Emblem Path

General emblem path preference

Sword path (Attack when possible)

0v0%

Shield path (HP and Def when possible)

0v0%

Node Strategy

Specific node priority strategy

Atk > Def > HP

0v0%

Atk > HP > Def

0v0%

Def > Atk > HP

0v0%

Def > HP > Atk

0v0%

HP > Atk > Def

0v0%

HP > Def > Atk

0v0%

Best Def Position

Best placement in a defense formation

Tank

0v0%

Flank

0v0%

Wing

0v0%

None

0v0%

Primary Use (Max 3)

Top scenarios where this hero excels

Raids/War

0v0%

Defense

0v0%

Titans

0v0%

Tournaments

0v0%

Events

0v0%

Farming

0v0%

Visual Design

What do you think of the visual design?

Amazing

0v0%

Refreshingly new

0v0%

It’s ok

0v0%

It could be better

0v0%

Very bad

0v0%

Discussion

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❓ Frequently Asked Questions about Osamu

Q:What element and rarity is Osamu in Empires & Puzzles?

Osamu is a 4 star Ice hero (Blue) with epic rarity.

Q:What is Osamu's special skill?

Osamu's special skill is called "Iron Discipline Cut". 1x Mana Charge * Deals 350% damage to the target. * The target gets -35% defense for 2 turns. 2x Mana Charge * Deals 375% damage to the target. * The target gets -40% defense for 4 turns. 3x Mana Charge * Deals 400% damage to the target. * If the attack defeats the target, the caster gains 100% mana. (After a character has received 5 direct mana additions from Special Skill during a single turn, all subsequent direct mana additions done by Special Skills will have reduced power on that character.) * The target gets -45% defense for 6 turns.

Q:When was Osamu released?

Osamu was released on Sep 24, 2024.

Q:Which family does Osamu belong to?

Osamu belongs to the Ninja Family. Bonus for 1/2/3 Unique Heroes:. 5%/10%/15% chance to dodge normal attacks and Special Skills. 5%/10%/15% chance to counterattack with 60%/90%/120% of the damage received.

Q:What are Osamu's passive skills?

Weaker Minions: Enemy Minions have -50% HP.

Q:What is the mana speed of Osamu?

Osamu has Charge mana speed.

Hero Review

Osamu Hero Review: The 4-Star Ninja of Discipline

Special Skill

Iron Discipline Cut

Family Bonus

Tower - Ninjas

Costume Bonus

Costume Bonus

No Costumes Available

Passives

Passive Skills

Aether Power

Attack Up

Talents

Master Revive

Release Date

Release Date

About Release Dates

Hero Coach Info

Hero Coach Date

Not Eligible for Coaching

Visiting Outfitter Info

Visiting Outfitter Date

No Costumes Available

Matching Legendary Troops

Mana Optimization Strategy

How it works

5★ Mana Troop Set

5★ Mana Troop Set

Ravager Warriors

Veteran Wizard

General Information

Osamu "Iron Discipline Ninja"

Ascension Requirements

Limit Break Requirements

Stats & Emblems

Simulation: 0 Emblems

Community Feedback

Overall Grade

Summon Value

Copies to Keep

Limit Break Priority

Emblem Path

Node Strategy

Best Def Position

Primary Use (Max 3)

Visual Design

Discussion

Join the Hero Discussion

Council Login Required

❓ Frequently Asked Questions about Osamu

Q:What element and rarity is Osamu in Empires & Puzzles?

Q:What is Osamu's special skill?

Q:When was Osamu released?

Q:Which family does Osamu belong to?

Q:What are Osamu's passive skills?

Q:What is the mana speed of Osamu?