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Senectus is an enemy that can randomly appear during Nightmare Chaos runs in Chaos Zero Nightmare (CZN). Learn more about Senectus, its mechanics, and rewards with this guide!
List of Contents
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When fighting Senectus, the core combat mechanic to keep in mind is to never consecutively use 2 cards from the same Combatant. Using 2 cards from the same Combatant consecutively will cause Senectus to attack immediately and raise your team's stress.

It is important that you burst down Senectus before Turn 3. After Turn 3, Senectus will grow stronger and inflict even more stress on your Combatants. The longer the fight goes, the more difficult it will be for you to win.

If you lack the DPS needed to defeat Senectus quickly, you can use the Fear card to escape. Upon using the card, you will need to win the dice roll to escape. Failing the dice roll will keep you in the fight, but you can use this card once per turn to try again.
| Equipment | Effects | Stats |
|---|---|---|
Announcement of Catastrophe
|
+12% Defense Decrease the number of Break Recovery cards required by all Combatants by 1 |
DEF: 11 / 19 / 25 / 30 / 34 |
Dice of Derangement
|
+8% Max Health At the end of battle, if HP is below 50% of max HP, recover 8% of max HP At the end of the battle, if HP is 50% or higher that max HP, -5 Stress to the Combatant with the highest Stress |
HP: 24 / 45 / 66 / 80 / 91 |
Shell of Aberration
|
+12% Defense When Stress increases, there is a 50% chance that Stress increases by 1 less |
DEF: 11 / 19 / 25 / 30 / 34 |
Sphere of Randomness
|
+10% max HP At the start of battle, +1 AP, Draw 1 |
HP: 24 / 45 / 66 / 80 / 91 |
Tentacles of Chaos
|
+8% ally Attack Upon enemy Defeat, -2 Stress to the Combatant with the highest Stress |
ATK: 31 / 50 / 68 / 81 / 90 |
Intellect of Discord
|
+18% Attack On Ravage, decrease Stress of allies by 1 |
ATK: 31 / 50 / 68 / 81 / 90 |
Upon defeat, Senectus can drop 1 of 6 possible Mystic Equipment.
List of All Equipment

You can encounter Senectus randomly as you progress through Chaos runs with Nightmare Mode activated.

Beginner's Guide: All Tips and Tricks



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