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MU Online Castle Siege Guide

Castle Siege is a large guild PvP event where alliances invade or defend the castle. Register through the Guardsman, destroy the castle defenses, control both crown switches and protect the Guild Master while the official seal is completed.

Castle Siege Guide Contents

Overview · Registration · Rules · Castle Defense · Official Seal · Strategy · Life Stone · Siege Potions

Castle Siege Overview

A competing guild must be among the three selected guilds. During registration, participating guilds deliver Sign of Lord items to the Guardsman in Valley of Loren at coordinates 98, 60. The guild holding the official seal when the siege ends becomes the Castle Lord.

MU Online Castle Siege battlefield overview

How to Register for Castle Siege

StepRequirement
1. Find the GuardsmanGo to Valley of Loren, coordinates 98, 60.
2. RegisterThe guild must belong to an alliance to participate.
3. Compete for SelectionDeliver Sign of Lord items during the registration period. Three guilds are selected.

Guardsman NPC for Castle Siege registration in Valley of Loren

Castle Siege Rules

RuleDetails
Official SealOnly the Guild Master can stamp the official seal.
Crown ShieldTwo allied characters must control both crown switches.
Seal DurationThe Guild Master must accumulate 60 seconds on the pedestal.
InterruptionThe attempt fails if a switch is released or the Guild Master is killed, pushed or leaves the throne room.
Winning ConditionThe guild holding the official seal when the siege ends becomes Castle Lord.
CombatPlayers can attack without pressing Ctrl. Normal damage is reduced during the siege.

Castle Gates and Guardian Statues

Castle gates have defensive power and durability and can only be attacked during the siege. Weapon durability decreases heavily when attacking gates or statues, so Potion of Bless and Potion of Soul are recommended. Gates and statues can be upgraded through three stages before battle, but cannot be restored or upgraded during combat.

DefenseFunctionVisual
Castle GatesOuter, middle and inner gates block routes to the Dragon Tower.Castle Siege gate
Guardian StatuesDestroy all four statues to remove the Dragon Tower shield. They restore nearby HP, MP and AG.Castle Siege Guardian Statue
Defense LayoutOnly defenders can cross the Dragon Tower shield while it remains active.Castle Siege entrance and defense layout

Crown Switches and Official Seal

MechanicRequirementVisual
Crown SwitchesTwo allied characters must remain on the switches. Moving or killing either holder closes the crown.Castle Siege crown switch
Official SealThe Guild Master accumulates 60 seconds. Leaving, dying or being displaced resets the time. Each click on the seal removes one accumulated second.Guild Master registering the Castle Siege official seal

Important: Protect both switch holders and the Guild Master. Losing any one of them can cancel the seal attempt.

Castle Siege Strategy

SituationRecommended Action
Guild MasterA Dark Lord using Dark Horse is not displaced during the Guild Master Crown Seal.
Switch HoldersStay on the switches and avoid displacement so the crown remains open.
Stop Enemy SealTarget a switch holder or use displacement skills such as Cyclone, Lightning and EarthQuake.

How to Create and Use a Life Stone

Required MaterialAmount
Jewel of Bless5
Jewel of Soul5
Jewel of Guardian1
Jewel of Chaos1

Create the Life Stone in the Chaos Machine. Only the Guild Master or Assistant Guild Master of an invading team can place it. Placement takes 60 seconds, after which it becomes a guild respawn point and restores HP, MP and AG within three tiles. It can be destroyed and cannot be used by defenders.

Life Stone used during Castle Siege

Potion of Bless and Potion of Soul

PotionItemDurationEffect
Potion of BlessPotion of Bless120 secondsIncreases damage against gates and Guardian Statues by 20%. It does not increase PvP damage.
Potion of SoulPotion of Soul60 secondsAdds 8 AG recovery, 20 attack speed and 50% defense against Lightning and Ice.

Castle Siege Quick Reference

Register through the Guardsman at 98, 60 → deliver Sign of Lord items → destroy the gates and four Guardian Statues → control both crown switches → protect the Guild Master during the 60-second official seal → hold the seal when the siege ends.

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