Battle Map - Cairos Dungeon - Secret Dungeon is one of those Dungeon who are hidden and have to be found by yourself or your Friends, also they can be available by Com2uS Event! They are found as a Reward when fighting in one of the 5 Halls of Elements (Water, Fire, Wind, Dark or Light). When found, they are only available for 1 hour! Secret Dungeon always represent a Monster, by entering the Secret Dungeon, it will have as Monsters to fight the same as the Secret Dungeon represent. (Secret Dungeon - Light Inugami) However, fighting in the Hall of Light will only give Secret Dungeon Light Monster. Secret Dungeon have 10 different stages to fight the represented Monster, by advancing each stage, those Monsters will become strong and strongest and finally at the stage 10, it will have a Boss to fight! By clearing each stage, it will awards the players with Summoning Piece for the Monster Represented! When collecting enough Summoning Piece, they can be used in the Summoning Circle to Summon 1x the Monster! The number of Summoning Pieces required depends on the Grade of that Monster.
Players can enter into other Players Secret Dungeons if they are Friend! A Secret Dungeon who is found is available to all Players in the Friends List, even if they have been Friend Before or After the Discovery but during the 1 hour of availability! When 20 different Friends have entered the Secret Dungeon, it will be permanently inaccessible for any other Friend who will try to enter it. For each Friend who enters the Secret Dungeon, the Owner of the Secret Dungeon will receive 1x extra Summoning Piece, but only 1 time per Friend!
Each Secret Dungeon have 10 Stages to Fight the Represented Monster! By each Stage completed, the Monster Difficulty will raise from Stage to Stage! The Awakened version of the Monster will start to appear at Stage 3. On the Stage 10 (Final Stage), a Boss version and two Awakened versions will appear!
The Reward of any Secret Dungeon is Summoning Pieces of the Represented Monster! Between 0 to 4x. By Clearing each Stage, the number of Summoning Pieces that will be Rewarded will increase. Also, quitting the Battle at any point will give the Reward of each Stage Cleared.
In order to use our Summoning Pieces earned, it require to go in the Summoning Circle! The Amount require to Summon any Monster depend on his Grade!
Com2uS can open Secret Dungeon as Event! During the Event, the Secret Dungeon will be available to participate for collecting Summoning Pieces of the Represented Monster by clearing each Stage! Normally, the Monster available are different from the Regular Secret Dungeon found by Players!
| Monster | Event Date |
| 2014 |
| Fire - Living Armor [Fusion] | 1st Event: 2014 Aug 8 to 14 |
| Water - Werewolf | 1st Event: 2014 Aug 22 to 24 |
| Fire - Mystic Witch | 1st Event: 2014 Sep 12 to 14 |
| Wind - Inugami | 1st Event: 2014 Sep 26 to 28 |
| Wind - Drunken Master | 1st Event: 2014 Oct 10 to 16 |
| Dark- Werewolf | 1st Event: 2014 Oct 24 to 25 (Halloween Special Event) |
| Dark- Grim Reaper | 1st Event: 2014 Oct 31 to Nov 1 (Halloween Special Event) |
| Water - Minotauros | 1st Event: 2014 Nov 14 to 20 |
| Fire - Serpent [Fusion] | 1st Event: 2014 Nov 28 to 30 |
| Fire - Imp Champion [Fusion] | 1st Event: 2014 Dec 12 to 18 |
| Water - Amazon | 1st Event: 2014 Dec 26 to 28 |
| 2015 |
| Fire - Beast Hunter [Fusion] | 1st Event: 2015 Jan 9 to 15 |
| Wind - Magical Archer | 1st Event: 2015 Jan 23 to 25 |
| Fire - Grim Reaper | 1st Event: 2015 Jan 30 to Feb 1 |
| Water - Martial Cat [Fusion] | 1st Event: 2015 Feb 13 to 15 |
| Wind - Lizardman [Fusion] | 1st Event: 2015 Feb 27 to Mar 1 |
| Water - Penguin Knight | 1st Event: 2015 Mar 13 to 15 |
| Fire - Bounty Hunter | 1st Event: 2015 Mar 27 to 29 |
| Wind - Mystic Witch | 1st Event: 2015 Apr 10 to 12 |
| Water - Living Armor | 1st Event: 2015 Apr 24 to 26 |
| Fire - Minotauros | 1st Event: 2015 May 8 to 10 |
| Wind - Battle Mammoth | 1st Event: 2015 May 22 to 24 |
| Water - Bounty Hunter | 1st Event: 2015 Jun 5 to 7 |
| Fire - Charger Shark | 1st Event: 2015 Jun 19 to 25 |
| Wind - Martial Cat | 1st Event: 2015 Jul 3 to 5 |
| Wind - Amazon [Fusion] | 1st Event: 2015 Jul 17 to 19 |
| Water - Martial Artist | 1st Event: 2015 Aug 21 to 27 |
| Wind - Penguin Knight | 1st Event: 2015 Sep 18 to 20 |
| Wind - Frankenstein | 1st Event: 2015 Oct 31 to Nov 1 (Halloween Special Event) |
| Fire - Mystic Witch | 2nd Event: 2015 Nov 6 to 8 |
| Water - Mummy [Fusion] | 1st Event: 2015 Nov 20 to 26 |
| Water - Minotauros | 2nd Event: 2015 Dec 4 to 6 |
| Fire - Battle Mammoth | 1st Event: 2015 Dec 18 to 20 |
| 2016 |
| Wind - Lizardman [Fusion] | 2nd Event: 2016 Jan 8 to 10 |
| Wind - Bounty Hunter [Fusion] | 1st Event: 2016 Jan 22 to 24 |
| Fire - Imp Champion [Fusion] | 2nd Event: 2016 Feb 5 to 7 |
| Water - Grim Reaper [Fusion] | 1st Event: 2016 Feb 19 to 21 |
| Water - Amazon | 2nd Event: 2016 Mar 4 to 7 |
| Fire - Penguin Knight | 1st Event: 2016 Mar 18 to 21 |
| Wind - Mystic Witch | 2nd Event: 2016 Apr 1 to 4 |
| Wind - Charger Shark [Fusion] | 1st Event: 2016 Apr 15 to 18 |
| Water - Martial Cat [Fusion] | 2nd Event: 2016 May 6 to 9 |
| Water - Lizardman | 1st Event: 2016 May 20 to 23 |
| Fire - Grim Reaper | 2nd Event: 2016 Jun 3 to 6 |
| Fire - Drunken Master | 1st Event: 2016 Jun 17 to 20 |
| Wind - Magical Archer | 2nd Event: 2016 Jul 1 to 3 |
| Water - Battle Mammoth | 1st Event: 2016 Jul 15 to 17 |
| Fire - Bounty Hunter | 2nd Event: 2016 Aug 5 to 8 |
| Wind - Martial Artist | 1st Event: 2016 Aug 19 to 22 |
| Water - Penguin Knight | 2nd Event: 2016 Sep 2 to 4 |
| Fire - Lizardman | 1st Event: 2016 Sep 23 to 26 |
| Wind - Amazon [Fusion] | 2nd Event: 2016 Oct 7 to 10 |
| Water - Frankenstein | 2nd Event: 2016 Oct 21 to 24 |
| Fire - Minotauros | 2nd Event: 2016 Nov 4 to 7 |
| Wind - Beast Hunter | 1st Event: 2016 Nov 18 to 21 |
| Water - Living Armor | 2nd Event: 2016 Dec 2 to 5 |
| Fire - Martial Cat [Fusion] | 1st Event: 2016 Dec 16 to 19 |
| 2017 |
| Wind - Battle Mammoth | 2nd Event: 2017 Jan 6 to 9 |
| Fire - Mystic Witch | 3rd Event: 2017 Feb 3 to 6 |
| Wind - Mummy | 1st Event: 2017 Feb 17 to 20 |
| Water - Martial Artist | 2nd Event: 2017 Mar 3 to 6 |
| Fire - Elven Ranger | 1st Event: 2017 Mar 17 to 20 |
| Wind - Penguin Knight | 2nd Event: 2017 Mar 31 to Apr 3 |
| Fire - Battle Mammoth | 2nd Event: 2017 Apr 5 to 8 |
| Wind - Imp Champion | 1st Event: 2017 May 19 to 22 |
| Water - Mummy [Fusion] | 2nd Event: 2017 Jun 2 to 5 |
| Fire - Martial Artist | 1st Event: 2017 Jun 23 to 26 |
| Wind - Charger Shark [Fusion] | 2nd Event: 2017 Jul 7 to 10 |
| Water - Drunken Master | 1st Event: 2017 Jul 21 to 24 |
| Fire - Martial Cat [Fusion] | 2nd Event: 2017 Aug 4 to 7 |
| Wind - Elven Ranger | 2nd Event: 2017 Aug 18 to 21 |
| Water - Lizardman | 2nd Event: 2017 Sep 1 to 4 |
| Fire - Mummy | 1st Event: 2017 Sep 15 to 18 |
| Wind - Martial Artist | 2nd Event: 2017 Oct 6 to 9 |
| Water - Martial Cat [Fusion] | 3rd Event: 2017 Oct 20 to 23 |
| Fire - Charger Shark | 2nd Event: 2017 Nov 3 to 6 |
| Wind - Mystic Witch | 3rd Event: 2017 Nov 17 to 20 |
| Water - Bounty Hunter | 2nd Event: 2017 Dec 1 to 4 |
| Fire - Living Armor [Fusion] | 2nd Event: 2017 Dec 15 to 18 |
| 2018 |
| Wind - Inugami | 2nd Event: 2018 Jan 5 to 8 |
| Water - Werewolf | 2nd Event: 2018 Jan 19 to 22 |
| Wind - Frankenstein | 2nd Event: 2018 Feb 16 to 19 |
| Water - Elven Ranger | 1st Event: 2018 Mar 2 to 5 |
| Fire - Amazon | 1st Event: 2018 Mar 23 to 26 |
| Wind - Beast Hunter | 2nd Event: 2018 Apr 6 to 9 |
| Water - Minotauros | 3rd Event: 2018 May 4 to 7 |
| Fire - Penguin Knight | 2nd Event: 2018 May 18 to 21 |
| Wind - Drunken Master | 2nd Event: 2018 Jun 1 to 4 |
| Fire - Lizardman | 2nd Event: 2018 Jul 6 to 9 |
| Wind - Imp Champion | 2nd Event: 2018 Jul 20 to 23 |
| Water - Charger Shark | 1st Event: 2018 Aug 3 to 6 |
| Fire - Bounty Hunter | 3rd Event: 2018 Aug 24 to 27 |
| Light - Fairy Queen | 1st Event: 2018 Sep 7 to 10 |
| Wind - Grim Reaper [Fusion] | 1st Event: 2018 Sep 21 to 24 |
| Water - Living Armor | 3rd Event: 2018 Oct 5 to 8 |
| Fire - Mystic Witch [Fusion] | 4th Event: 2018 Nov 2 to 5 |
| Wind - Mummy | 2nd Event: 2018 Nov 16 to 19 |
| Fire - Martial Artist | 2nd Event: 2018 Dec 21 to 24 |
| 2019 |
| Wind - Martial Cat | 2nd Event: 2019 Jan 4 to 7 |
| Water - Frankenstein | 2nd Event: 2019 Jan 18 to 21 |
| Fire - Elven Ranger | 2nd Event: 2019 Feb 1 to 4 |
| Wind - Battle Mammoth | 3rd Event: 2019 Feb 15 to 18 |
| Water - Penguin Knight | 3rd Event: 2019 Mar 1 to 4 |
| Fire - Drunken Master | 2nd Event: 2019 Mar 15 to 18 |
| Wind - Lizardman [Fusion] | 3rd Event: 2019 Apr 5 to 8 |
| Water - Beast Hunter | 1st Event: 2019 May 3 to 6 |
| Fire - Minotauros | 3rd Event: 2019 May 17 to 20 |
| Wind - Bounty Hunter [Fusion] | 2nd Event: 2019 Jun 7 to 10 |
| Water - Mummy [Fusion] | 3rd Event: 2019 Jun 21 to 24 |
| Fire - Imp Champion [Fusion] | 3rd Event: 2019 Jul 5 to 8 |
| Wind - Charger Shark [Fusion] | 3rd Event: 2019 Jul 19 to 22 |
| Water - Werewolf [Fusion] | 3rd Event: 2019 Aug 2 to 5 |
| Fire - Grim Reaper | 3rd Event: 2019 Aug 23 to 26 |
| Wind - Martial Artist | 3rd Event: 2019 Sep 6 to 9 |
| Water - Martial Cat [Fusion] | 4th Event: 2019 Sep 20 to 23 |
| Fire - Battle Mammoth | 3rd Event: 2019 Oct 4 to 7 |
| Wind - Amazon [Fusion] | 3rd Event: 2019 Oct 18 to 21 |
| Water - Living Armor | 4th Event: 2019 Nov 1 to 4 |
| Fire - Penguin Knight | 3rd Event: 2019 Nov 22 to 25 |
| Wind - Elven Ranger | 2nd Event: 2019 Dec 6 to 9 |
| Water - Minotauros | 4th Event: 2019 Dec 20 to 23 |
| 2020 |
| Fire - Serpent [Fusion] | 2nd Event: 2020 Jan 3 to 6 |
| Wind - Mystic Witch | 4th Event: 2020 Jan 17 to 20 |
| Water - Drunken Master | 2nd Event: 2020 Feb 7 to 10 |
| Fire - Mummy | 2nd Event: 2020 Feb 21 to 24 |
| Wind - Beast Hunter | 3rd Event: 2020 Mar 6 to 9 |
| Water - Charger Shark | 2nd Event: 2020 Mar 20 to 23 |
| Fire - Frankenstein | 1st Event: 2020 Avr 3 to 6 |
| Wind - Penguin Knight | 3rd Event: 2020 Avr 17 to 20 |
| Water - Imp Champion | 1st Event: 2020 May 22 to 25 |
| Fire - Amazon | 2nd Event: 2020 Jun 5 to 8 |
| Wind - Battle Mammoth | 4th Event: 2020 Jul 3 to 6 |
| Water - Elven Ranger | 2nd Event: 2020 Jul 17 to 20 |
| Fire - Drunken Master | 3rd Event: 2020 Aug 7 to 10 |
| Wind - Living Armor | 1st Event: 2020 Aug 21 to 24 |
| Water - Lizardman | 3rd Event: 2020 Sep 4 to 7 |
| Fire - Bounty Hunter | 4th Event: 2020 Sep 18 to 21 |
| Wind - Mummy | 3rd Event: 2020 Oct 2 to 5 |
| Water - Battle Mammoth | 2nd Event: 2020 Oct 16 to 19 |
| Fire - Martial Artist | 3rd Event: 2020 Nov 6 to 9 |
| Wind - Frankenstein | 3rd Event: 2020 Nov 20 to 23 |
| Water - Amazon | 3rd Event: 2020 Dec 4 to 7 |
| 2021 |
| Wind - Imp Champion | 3rd Event: 2021 Jan 8 to 11 |
| Water - Penguin Knight | 4th Event: 2021 Jan 22 to 25 |
| Fire - Elven Ranger | 3th Event: 2021 Feb 5 to 8 |
| Wind - Drunken Master | 3th Event: 2021 Feb 19 to 22 |
| Water - Beast Hunter | 2nd Event: 2021 Mar 5 to 8 |
| Fire - Martial Cat [Fusion] | 3rd Event: 2021 Mar 19 to 22 |
| Wind - Bounty Hunter [Fusion] | 3rd Event: 2021 Avr 2 to 5 |
| Water - Frankenstein | 3rd Event: 2021 Avr 23 to 26 |
| Fire - Lizardman | 3rd Event: 2021 May 7 to 10 |
| Wind - Grim Reaper [Fusion] | 2nd Event: 2021 Jun 4 to 7 |
| Water - Mummy [Fusion] | 4th Event: 2021 Jul 2 to 5 |
| Fire - Living Armor [Fusion] | 3rd Event: 2021 Jul 23 to 26 |
| Wind - Charger Shark [Fusion] | 4th Event: 2021 Aug 6 to 9 |
| Water - Martial Artist | 3rd Event: 2021 Aug 20 to 23 |
| Fire - Minotauros | 4th Event: 2021 Sep 3 to 6 |
| Wind - Elven Ranger | 3rd Event: 2021 Sep 17 to 20 |
| Water - Drunken Master | 3rd Event: 2021 Oct 1 to 4 |
| Fire - Imp Champion [Fusion] | 4th Event: 2021 Oct 15 to 18 |
| Wind - Martial Cat | 3rd Event: 2021 Nov 5 to 8 |
| Water - Bounty Hunter | 3rd Event: 2021 Nov 19 to 22 |
| Fire - Battle Mammoth | 4th Event: 2021 Dec 3 to 6 |
| Wind - Beast Hunter | 4th Event: 2021 Dec 17 to 20 |
| 2022 |
| Water - Grim Reaper [Fusion] | 2nd Event: 2022 Jan 7 to 10 |
| Fire - Frankenstein | 2nd Event: 2022 Jan 21 to 24 |
| Wind - Living Armor | 2nd Event: 2022 Feb 4 to 7 |
| Water - Elven Ranger | 3rd Event: 2022 Feb 18 to 21 |
| Fire - Fairy | 1st Event: 2022 Mar 4 to 7 |
| Wind - Martial Artist | 4th Event: 2022 Mar 18 to 21 |
| Water - Imp Champion | 2nd Event: 2022 Apr 1 to 4 |
