Kill RB Darnel and get a Blue Crystal
Guide by Agnosis, Alyla and Chelai from Abyss clan
Emerald Square is one of the 3 instances from Crystal Caverns.
To complete the instance it's required that one party member has three Secret Keys. These are not tradable.
The Contaminated Crystal will be consumed if you kill the instance Raid Boss. The Refresh Timer will begin when the Raid Boss dies. To reenter Crystal Caverns, repeat Dark Cloud Mansion and wait 24 hours.
Players who stay dead for more than 10 minutes or disconnect from the instance will be ported out. You can enter again and rejoin the party if they have not yet reached the Raid Boss room.
If you only wish to farm the instance monsters, you can skip the Raid Boss.
To reset the instance: skip the Raid Boss and leave the instance with a Scroll of Escape or Party Return and wait 20 minutes for the timer to reset. You can then enter the Crystal Caverns again.
Don't drown while you wait!
You can access the Crystal Caverns through the Oracle Guide beneath Parnassus. In order to enter, you need at least two players in your party, and everyone must have a Contaminated Crystal. Once you click Touch the Sphere, the 90-minute timer starts, and you're teleported to the Preparation Room (Marked as Red Triangle on the map).
In the Preparation Room, speak with the Oracle Guide and select Emerald Square and go through the left door.
You will arrive in a middle of a long corridor with doors on either end.
Clear the monsters on the left side in the Blue Coral Key Corridor until you get to Gatekeeper Lohan. Kill Lohan and get the Blue Coral Key. Use the key to open Sapphire Gate and start Emerald Square instance.
There are multiple areas and rooms: Main Square with upper and lower parts, 1 Secret Room, 3 Secret Garden Rooms, and Darnel's Room. Monsters in Emerald Square are probably the easiest to kill from all Crystal Cavern instances. They are social, but spread around and few have any resists.
You can find Blacksmith Lahm in the secret room. To open this room you will need a dagger with Detect Trap and Remove Trap skills learned.
Blacksmith Lahm can trade your seed of evil shards for Dynasty recipes or keys.
You need 3 Secret Keys in total for the whole instance, so don’t screw up as the Race Event to obtain these keys is highly contested and hard to obtain. Just hope that the dagger doesn't get a critical error/disconnected.
If at any point a player disconnects, they can easily reenter and link up with their party.
Darnel is one of three raid bosses you will have to kill to be able to enter Baylor’s Lair. Your Contaminated Crystal will become a Blue Crystal when Darnel dies, and you will receive a Black or White Seed of Evil – Shard.
Any party member who disconnects or stays dead for more than 10 minutes gets ported out and cannot reach Darnel's Room nor can they enter Baylor's Lair if the leader chooses that option. A contaminated crystal will not be consumed when Darnel dies and they will not receive a Blue Crystal.
Click on the links below to watch our Emerald Square run on L2 Reborn OBT.
Please note: Darnel raid boss fight - fail because someone hit RB before party entered