Advent Stages

The Advent Stages are a group of time-limited stages that appear twice a month for two days each. All Advent Stages contain a unique boss, are No Continues stages, and have a difficulty of either Deadly or Merciless. Most of them are unlocked after Into the Future Chapter 1, except for Blue Impact and Bottom of the Swamp, unlocked after beating Cats of the Cosmos Chapter 2 and Into the Future Chapter 2 respectively.

Once encountered, the boss will be recorded in the Enemy Guide. If the stage is completed, there is a chance to unlock a new, unique Rare or Super Rare (30-40% success rate), as well as at least 3800 XP, 30 Cat Food and 1 Leadership for the first victory. After beating an Advent Stage, an Awakening Stage for the cat unlocked in said stage will start to appear on the same dates. Beating these Awakening Stages can unlock new Advent Stages with variants of bosses found in the originals.

List of Advent Stages

Name	Boss	Cat	Appearance Dates
Clionel Ascendant (Clionel Dominant)	Cruel Angel Clionel	Catway	7/8/21/22
River Styx (River Acheron)	Hannya	Express Cat	11/12/25/26
Queen's Coronation (Queen's Condemnation)	Queen B	Little Leaguer Cat	1/2/15/16
Dead on Debut (Dead by Encore)	Daboo of the Dead	Curling Cat	3/4/17/18
King Wahwah's Revenge (King Wahwah's Return)	King Wahwah	Glass Cat	5/6/19/20
Deeply Dreaming (A Deeper Dream)	Bakoo	Lone Cat and Kitten	9/10/23/24
Blue Impact	Puffsley's Comet	Mightycat	13/14/27/28
Courts of Torment	Black Okame	Medusa Cat	11/12/25/26
Papuu's Paradise	Heavenly Herald Papuu	Cossack Cat	3/4/17/18
The Old Queen	Queen Mother V	Slime Cat	1/2/15/16
Bottom of the Swamp	Kappy Jr.	Teacher BearCat	13/14/27/28
Wanwan's Glory	Everlord Wanwan	Rugby Cat	5/6/19/20
Z-Onel Rises	Death Angel Z-Onel	Phantom Cat	7/8/21/22
First Errand	Doremi	Bakery Cat	Estimated:9/10/23/24

Trivia

Prior to February 2018, the first five Advent Stages had no known schedule.
- Deeply Dreaming had no known schedule until January 2019.
- Blue Impact, Courts of Torment, Papuu's Paradise and The Old Queen had no known recurring schedule until January 15th, 2020.
- Wanwan's Glory had no known recurring schedule until April 28th, 2020.

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