Yi Sun-sin (YSS) ROK Guide: Garrison Build and Pairings

Yi Sun-sin, commonly abbreviated as YSS, is a Legendary mixed-troop garrison commander in Rise of Kingdoms. He has Leadership, Garrison, and Defense talent trees and is designed mainly for city or alliance-structure defense.

YSS remains usable on accounts that already have him developed, but he is a narrow defensive investment. Most players should compare him with newer garrison options before spending a large reserve of Universal Legendary Sculptures.

Yi Sun-sin Quick Overview

Yi Sun-sin is sometimes searched for as Yi Sun Shin. However, the in-game commander name is Yi Sun-sin, and that spelling should be used consistently throughout the page.

Yi Sun-sin Versus Yi Seong-Gye

Yi Sun-sin and Yi Seong-Gye are separate Korean commanders with different abbreviations and battlefield roles.

Yi Sun-sin is abbreviated YSS. He should not be confused with Yi Seong-Gye, abbreviated YSG. YSS is a mixed-troop garrison commander, while YSG is primarily associated with Archers and area skill damage.

Is Yi Sun-sin Still Worth Investing In?

Yi Sun-sin is no longer a universal investment recommendation. His value depends on whether the account actually needs a mixed-troop garrison commander.

YSS Can Still Be Useful When

• He is already highly skilled or expertised.
• The account is assigned to city or structure defense.
• Wu Zetian or Theodora is already developed.
• The garrison contains at least two troop types.
• The account has strong defensive technology and equipment.
• The player understands current rally and swarm threats.
• Newer defensive commanders are unavailable.

YSS Is Usually a Weak New Investment When

• The player is not a garrison leader.
• Universal Legendary Sculptures are limited.
• The account needs open-field commanders first.
• The account lacks a suitable defensive partner.
• Equipment and armaments are underdeveloped.
• Newer garrison commanders are already available.
• The player expects one commander to make a city impossible to rally.

How to Get Yi Sun-sin

Yi Sun-sin appears in later commander rotations in older kingdoms. Depending on the current game version and kingdom progression, his sculptures may appear through:

• Wheel of Fortune
• Card King
• Universal Legendary Sculptures
• Other commander events shown in his current Sources panel

Community references disagree about one permanent kingdom-day threshold. Some sources list availability after approximately 310 days, while others place his Wheel rotation later.

Before planning Gems or sculptures:

1. Open the commander profile.
2. Select the Sources option.
3. Check the current kingdom’s commander rotation.
4. Confirm whether he is available through Wheel, Card King, or another event.
5. Compare the investment with newer defensive commanders.

Best Yi Sun-sin Skill Order

Yi Sun-sin’s active skill should be maximized first. His second skill supports garrison and alliance-territory combat, while the fourth skill and expertise are especially important to his defensive role.

Recommended Upgrade Process

1. Keep Yi Sun-sin at one star until Duke of Loyalty and Warfare reaches level five.
2. Unlock and improve Battle of Myeongnyang.
3. Use the current skill-control system carefully if targeting the fourth skill.
4. Do not assume that 5-5-1-5 is easy to reach without controlled upgrades.
5. Move toward expertise only when YSS has a confirmed garrison role.
6. Stop investing if a newer defensive commander provides more account value.

Yi Sun-sin Sculpture Requirement

A locked Legendary commander needs ten sculptures for summoning and 690 additional sculptures to maximize all four skills.

• To summon: 10 sculptures
• Summoned to expertise: 690 sculptures
• Locked to expertise: 700 sculptures total

Yi Sun-sin Skills Explained

Duke of Loyalty and Warfare

Skill type: Active
Rage requirement: 1,000

In field combat, Yi Sun-sin deals direct damage to one target. When he serves as a garrison commander, the skill changes into a fan-shaped attack that can hit up to three targets. Each additional target receives 15% less damage than the previous target.

The skill also reduces the targets’ March Speed for three seconds.

The multi-target effect is tied to garrison use. Do not describe YSS as a general open-field area-damage commander.

Battle of Myeongnyang

While YSS is fighting inside alliance territory or serving as a stronghold garrison commander, normal attacks have a 10% chance to increase Defense and all damage for three seconds.

This skill does not make YSS a general open-field commander. The field condition is limited to combat inside alliance territory.

Geobukseon

Geobukseon increases troop Defense. It also increases all damage after the army’s remaining strength falls below 50%.

The Defense bonus is useful throughout the battle. However, the additional damage does not activate until the garrison drops below half strength.

Winged Formation

Winged Formation works while Yi Sun-sin serves as a garrison commander. It improves the garrison’s Attack and adds a chance to trigger a protective shield together with increased counterattack damage.

At maximum level, current community references commonly list:

• Garrison Attack +20%
• Shield factor up to 500
• Counterattack damage +30%

The exact trigger chance and lower-level shield progression are not documented consistently across current community references. Check the live skill panel before publishing a full level-by-level table.

Broken Moon

Broken Moon is Yi Sun-sin’s expertise skill.

When the army or garrison contains at least two troop types:

• Troop Attack increases by 20%.
• Troop Defense increases by 20%.

This is why a pure Infantry, pure Cavalry, or pure Archer garrison does not use YSS’s complete expertise value.

Best Yi Sun-sin Talent Tree

The best YSS build prioritizes the Garrison tree, then adds durability and mixed-troop value from the Defense and Leadership trees.

Important Garrison Talents

• Empty Fortress Stratagem: Improves garrison damage output.
• Impenetrable Fortifications: Reduces damage from attacking armies.
• Impregnable: Reduces incoming skill damage.
• Nowhere to Turn: Improves Rage generation while defending.
• Adamantine Walls: Supports structure durability.
• City Guardian: Improves city-defense performance when applicable.
• King’s Guard: Supports garrison capacity and defense.
• Know Thy Enemy: Improves protection while several armies attack.
• Divine Favor: Adds sustain after active-skill use.

Important Leadership Talents

• Fresh Recruits: Increases troop capacity.
• Armed to the Teeth: Adds Attack when several troop types are present.
• Armored to the Teeth: Adds Defense when several troop types are present.
• Healing Herb: Adds situational sustain.

Primary Commander Requirement

Talent points work only from the primary commander.

Use YSS as primary when:

• The garrison depends on his Garrison and Leadership talents.
• His commander level provides sufficient troop capacity.
• The selected partner provides more value through skills than talents.

Use YSS as secondary when another commander has the stronger current talent build. In that case, YSS’s skills still work, but his talent tree does not.

Best Yi Sun-sin Pairings

The primary and secondary order depends on the talent tree, commander level, equipment, structure, and opponent. Do not label one order as universally correct without testing it against the current rally environment.

Wu Zetian and Yi Sun-sin

Wu Zetian is the classic partner for handling direct rallies. The pairing works with mixed garrison troops and combines YSS’s defensive statistics with Wu Zetian’s rally-focused toolkit.

Use it when:

• A direct rally is the main threat.
• Both commanders are already developed.
• The structure contains a reliable mixed troop composition.
• The account has suitable technology and equipment.

Do not build both commanders from zero only because older guides call the pairing top tier.

Theodora and Yi Sun-sin

Theodora is the classic anti-swarm partner. Her multi-target defensive pressure complements YSS’s garrison-only fan attack.

Use it when:

• The structure is likely to be swarmed.
• Several enemy marches may surround the garrison.
• Both commanders already have strong skills.
• The current rally environment does not require a newer specialist.

Theodora should not be described as a Rage-generation commander unless the current in-game skill text directly supports that claim.

Best Troop Composition for Yi Sun-sin

YSS should use at least two troop types after expertise. Broken Moon does not activate with a pure single-type army.

Mixed Troop Rules

• At least two troop types must be present.
• The troops do not need to be divided equally.
• Actual composition depends on available reinforcements.
• The partner’s skills may affect the preferred ratio.
• Equipment and armaments should support a mixed garrison.
• Alliance leadership should control reinforcement quality.

A city garrison naturally contains several troop types, but an alliance structure can receive poorly planned reinforcements. Do not allow low-tier or incorrect troops to weaken the structure merely to activate Broken Moon.

Equipment, Formation and Armaments

Yi Sun-sin needs a defensive setup that remains useful across mixed troop types.

Recommended Stat Priorities

1. Troop Health
2. Troop Defense
3. Damage reduction
4. Garrison attributes
5. Counterattack damage
6. Troop Attack
7. Skill-damage resistance

Avoid equipment that benefits only one troop type unless that troop type dominates the garrison and the complete setup still activates Broken Moon.

Formation and Armament Priorities

• Mixed-troop compatibility
• Garrison durability
• Reduced incoming damage
• Counterattack value
• Normal-attack resistance
• Skill-damage resistance
• Bonuses that match the actual defending structure

Use the strongest verified armament set available rather than forcing a weak formation simply because it is labeled for garrison use.

Where to Use Yi Sun-sin

Common Yi Sun-sin Mistakes

• Confusing YSS with YSG: They are different commanders with different roles.
• Using a pure troop type after expertise: Broken Moon needs at least two troop types.
• Treating YSS as an open-field commander: His strongest value is tied to garrison defense.
• Calling him a universal top-tier defender: He is now a specialized or legacy option.
• Spending Universals without a garrison role: Most players need open-field investments first.
• Using him secondary while discussing his talent tree: Secondary commander talents do not activate.
• Using an old pairing without checking the current rally meta: Matchups change.
• Ignoring equipment and technology: A commander pair cannot compensate for a weak account setup.
• Forcing an equal three-type troop split: Broken Moon only requires two troop types.
• Donating poor reinforcements: Incorrect troop tiers can weaken the structure.
• Assuming 310 days is a permanent unlock rule: Check the live Sources panel.
• Calling 700 the post-summon cost: It is the total locked-to-expertise requirement.

FAQ

Is Yi Sun-sin good in Rise of Kingdoms?

He is useful as a specialized mixed-troop garrison commander. He is not a strong general open-field, rally, or Canyon investment.

What does YSS mean in ROK?

YSS is the common abbreviation for Yi Sun-sin.

Is Yi Sun-sin the same as Yi Seong-Gye?

No. Yi Sun-sin is YSS, a mixed-troop garrison commander. Yi Seong-Gye is YSG, an Archer and area skill-damage commander.

What is the best Yi Sun-sin talent tree?

Use a Garrison-focused build with additional Defense and mixed-troop Leadership talents. The build applies only when YSS is primary.

Which commanders pair with Yi Sun-sin?

Wu Zetian is the classic direct-rally partner, while Theodora provides stronger anti-swarm and multi-target defensive pressure.

Does Yi Sun-sin need mixed troops?

Yes, after expertise. Broken Moon requires at least two troop types to provide its 20% Attack and 20% Defense bonuses.

Should free-to-play players invest in Yi Sun-sin?

Usually not with Universal Legendary Sculptures. Most F2P players receive more value from open-field commanders and broader account progression.

How many sculptures does Yi Sun-sin need?

He needs ten sculptures to summon and 690 more to expertise, for 700 total sculptures from locked to fully expertised.

Conclusion

Yi Sun-sin is a specialized mixed-troop garrison commander, not a general-purpose investment. His active skill changes into a multi-target attack while defending, and his expertise adds 20% Attack and 20% Defense when at least two troop types are present.

Use YSS only when the account has a clear garrison role, an appropriate partner, strong defensive technology, and suitable equipment. Wu Zetian remains the classic direct-rally partner, while Theodora provides better anti-swarm pressure.

Most new, free-to-play, and low-spending accounts should avoid forcing his expertise with Universal Sculptures. Accounts that already own a developed YSS can continue using him as a situational or legacy defender while comparing him against current garrison options.

Looking for more commander and strategy content? Explore more Rise of Kingdoms guides.