Echo Aria Events







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Guide for Gravel Echoes Duration: August 16th 2022 to September 15th 2022.

The Shop Event currency used in this event is Surface Samples.
 * For context, one run in Gravel Echoes: 30 Serum gives 64-70 Surface Samples.
 * Gravel Echoes can be Multi-Challenged up to 8 times maximum.
 * Reaching Authority Level 25 will enable an NPC to appear that immediately clears any stage and Multi-Challenge attempts after speaking to it.

Farming Tips
Use your Serum to grind only the first stage in "Gravel Echoes", do not spend Serum on the second stage because memories can be chosen in the shop.

Event Shop Tips
It is generally not recommended to redeem: and in the "Limited" section as it can be farmed anytime through the Dorm and will not be worth the Serum spent otherwise.

All 6 star Memories can be farmed other than Condelina and Guinevere so do take the chance to stock up.


 * -|Restrain Simulation=

Guide for the Restrain Simulation Event Duration: September 1st 2022 to September 15th 2022.

Pick Constructs and buffs to clear stages!
 * There are 14 stages in Normal Mode (VH-14).
 * There are 14 stages in Challenge Mode (EX-14).
 * "Basic Operator" currency can be gained by clearing Normal Mode stages, when using it, it will only be used for that current stage, getting more of it will extend the currency limit.
 * "Simulated Operator" currency can be gained from daily missions and Challenge Mode Stages, once used to redeem anything, it will be used permanently.
 * You get 3 chances everyday to play the challenge mode to gain "Simulated Operator".
 * You can use either "Basic Operator" or "Simulated Operator" currency to redeem Constructs or buffs to be used in Normal Mode stages.
 * You can only use "Basic Operator" currency to redeem Constructs or Buffs in Challenge Mode Stages.


 * Only clear Challenge Mode stages while you still have the 3 daily clears that give "Simulated Operator".
 * As "Simulated Operator" will often be used to shorten the gap from the lack of "Basic Operator" needed to get 3 Constructs to clear Normal Mode stages, always go for the cheapest option.
 * Do not pick Buffs unless you are sure you can accommodate the price later on.
 * Do your daily missions and 3 daily Challenge Mode stage clears everyday to clear the event as fast as possible.




 * -|Fist of the Overlord=

Guide for the Fist of the Overlord Event Duration: November 9th 2022 to November 16th 2022.

Play Rock-Paper-Scissors and be the Fist of the Overlord!
 * Play Rock-Paper-Scissors with opponents that vary in difficulty.
 * Maximum number of rounds is 9, will increase with each opponent.
 * You can choose Rock, Paper, or Scissors to go against the AI opponent.
 * You can enable [Third Eye] to foresee how many times the opponent will throw 1 kind of action and plan your choices with that information.
 * You defeat the opponent if your wins are equal to or more than theirs.
 * Each opponent is unlocked with 3 "Antique Mirrors" gained from daily missions, once unlocked, no more "Antique Mirrors" is needed to challenge the opponent.





Guide for Babel Tower: Morgana Sicily Duration: August 25th 2022 to September 15th 2022 For this season of Babel Tower, refer to the guide below.
 * -|Babel Tower: Morgana Sicily=
 * Babel Tower/Echo Aria