Underground Treasure Chest 11



Underground Treasure Chest (地下に眠る千両箱) involves exploring the vast area beneath Osaka Castle and collecting Koban. To enter, select the event banner from the sortie page.

Event Period: 4 April 2018 (Wed) 17:00 until 17 April 2018 (Tue) 12:59 Japan Standard Time.

Related events:
 * Other Underground Treasure Chest events

How to Play

 * This event is to investigate the mysterious dimension under the Osaka Castle and collect koban.
 * The event is accessible via the event banner in the Front Lines.
 * This event has underground floors from 1 to 99. You can collect Koban by clearing the boss node on each floor, and by stepping on normal map nodes.
 * Event missions are available which will award rewards for completion.
 * When you repeat the floors and clear the boss node, you can choose the "Continue Investigation" button to repeat the same floor, or "Return to Citadel" to return.
 * In rare instances, Hakata Toushirou, Gotou Toushirou, Shinano Toushirou, Houchou Toushirou and Mouri Toushirou will drop from the boss nodes on specific floors.
 * 10th Floor - Hakata Toushirou
 * 20th Floor - Gotou Toushirou
 * 30th Floor - Shinano Toushirou
 * 40th Floor - Houchou Toushirou
 * 50th ~ 99th Floor - Mouri Toushirou
 * Mouri Toushirou's drop rate has been improved! For every 10th floor further down the castle, Mouri Toushirou's drop rate increases!
 * Mouri Toushirou will only drop  once  from this event. Even if you have obtained Mouri Toushirou from previous events, you can obtain one more copy from this event.

Transfer Token
Using this item will let you skip to the boss node.

Osaka Castle Underground Floor Map
Using this item will let you skip 10 floors. It can only be used until Floor 40.

In the Event of Internet Disconnections
During the event, if the game is interrupted due to connection issues, it may be possible to continue playing from where the interruption occurred after logging in again within 24 hours of the disconnection.

Tips

 * After defeating the boss on each floor, you will automatically proceed to the next floor.
 * Troop count is restored at the end of each floor, as if one had returned to the citadel at the end of a map.
 * Enemy strength and floor difficulty increase every 10 floors.
 * Swords accumulate fatigue as they progress through floors.
 * Since you cannot confirm fatigue levels during sortie, it is recommended to return to citadel at regular intervals to monitor fatigue.
 * All floors within the event are normal day maps. Ootachi and Naginata have an advantage, however putting Tantou in your team will slightly increase the chances of stepping on resource nodes.

Missions
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Rewards
The following rewards are given for clearing each floor of the Underground Treasure Chest map.

Floors
Underground Treasure Chest 10/Floor 1 - 50|Floor 1 - 50 Underground Treasure Chest 10/Floor 51 - 99|Floor 51 - 99
 * Floor 1 - 50
 * Floor 51 - 99