Shiyu Defense

Shiyu Defense is a periodic military operation organized by the New Eridu Defense Force. Its primary objective is to defend inert-type massive Ether-storing constructs known as "Shiyu" located within Hollow Zero and to annihilate enemies attracted by the substantial amounts of Ether matter within the Shiyu.
The system requires Inter-Knot Level Level 20 to unlock and can be accessed at Scott Outpost: Outpost Interior.
==General Rules==
* Shiyu Defense is a high-difficulty challenge stage where you must defeat all enemies within a limited time to complete the challenge.
* There are 2 defense areas in Shiyu Defense:
** : Unlocked one by one as you progress through the challenges.
** : Periodically updates with new stage content.
* Earn rewards of different tiers based on completion time, including .
==Nodes & Frontiers==
Shiyu Defense is composed of two nodes: The "Stable Node" and the "Critical Node."
The player must complete all 10 frontiers of the Stable Node to unlock the Critical Node, which consists of 7 frontiers that reset twice per Version.
Upon reaching Stable Node: Seventh Frontier, each stage will be split into 2 halves, requiring the player to create 2 separate teams of Agents and Bangboo. Each half will have its own enemy line-up with corresponding enemy resistances and Agent attribute recommendations. Each half also features its own Frontier Effect, which can be either a buff or debuff to certain gameplay mechanics, stats or damage multipliers, amongst various other effects.
In the Critical Node, the frontier effect remains consistent across all frontiers.
Each frontier of Shiyu Defense can be replayed infinitely, however once the player has achieved an -Grade across all frontiers of the Stable Node, no further rewards will be available to claim. For the Critical Node, the rewards will refresh alongside the twice-per-version reset.
==Rewards==
===Stable Node===
* Each reward is a 1-time claim and will not refresh.
Frontier	Grade	Grade	Grade
First 	 	 	
Second 	 	 	
Third 	 	 	
Fourth 	 	 	
Fifth 	 	 	
Sixth 	 	 	
Seventh 	 	 	
Eighth 	 	 	
Ninth 	 	 	
Tenth 	 	 	
====Total Rewards====
===Critical Node===
* Each reward can only be claimed 1-time per refresh.
Frontier	Grade	Grade	Grade
First 	 	 	
Second 	 	 	
Third 	 	 	
Fourth 	 	 	
Fifth 	 	 	
Sixth 	 	 	
Seventh 	 	 	
====Total Rewards====
==Other Languages==
==Change History==
==Navigation==