Tidal Defense Simulator

The agents of the Black Shores have long been the first to respond in times of crisis. To lower the risks they face in fighting the TDs, the Black Shores has developed specialized combat devices designed to counter the threat.
Valentina is now leading simulation tests of the devices, and she's counting on your assistance to push the tests forward.

Complete Main Quest "Through the Sea Thou Break" to unlock

[About]
The agents of the Black Shores have long been the first to respond in times of crisis. To lower the risks they face in fighting the TDs, the Black Shores has developed specialized combat devices designed to counter the threat. Valentina is now leading simulation tests of the devices, and she's counting on your assistance to push the tests forward.

[Eligibility]
Reach Union Level 14 and complete Main Quest Chapter II Prologue to unlock.

[Event Rules]
1. In this event, you will deploy Combat Machines to defend the Energy Matrix against simulated TD Outbreaks.
2. The simulated Tacet Discords attack in waves. You will have time to strategically place various types of Combat Machines before each wave begins.
3. Build your lineup wisely to counter different types of Tacet Discord.
4. Progress through the stages to unlock the "Deathtrap Mode," where new Tactics provide powerful battle boosts.
5. During the Limited-Time Rewards period, complete tasks to earn "TD Slayer" Coupons. Collect enough to unlock Phantom: Fallacy of No Return.
6. Any unclaimed rewards will be automatically sent to you via Mail the next time you log in within 30 days after the Limited-Time Rewards period expires.
7. Limited-time rewards cannot be claimed once the reward window ends, but you can continue playing to earn permanent rewards.