It is recommended that you be at level 45 or higher before attempting to obtain this summon. First, successfully complete the Mob Hunt mission for White Mousse to get the Water Gate Key. Go to the Central Control area and use the Water Gate Key to close the gates to the 11th and 4th areas, using the little pedestals on the ground. Then, go into the 4th Accessory District and find a control for the 1st area gate and activate it. Return to the Central Control area and reopen the 11th and 4th gates, then close the 10th and 3rd gates. Next, go to the 3rd Accessory District and again close the switch to the 1st area. Return again and open the 10th gate and close the 4th. You should now be able to go to the south part of the 1st Control Area where you will find the Queklain Boss. Defeat the Boss to get the Queklain summon.