Realm of Carnage (Deadly)

Realm of Carnage (Deadly) is an Advent Stage appearing on the 11th, 12th, 25th, and 26th of every month. When clearing the stage, there is a chance to unlock Express Cat.

Battleground

• Hannya spawns as the boss after 10 seconds.
• 15 Ginger Snaches spawn as peons, but stop spawning after around 170 seconds.
• 1 Bore spawns after 33.3 seconds^1000f.
• 1 R. Ost spawns after 83.3 seconds^2500f.
• 1 Bore spawns after 133.3 seconds^4000f.
• 1 R. Ost spawns after 200 seconds^6000f.
• 3 Sir Seals spawn after 233.3 seconds^7000f, delay 33.3~50 seconds^1000~1500f.
• Infinite Bores spawn after 283.3 seconds^8500f, delay 166.7 seconds^5000f.
• Infinite R. Osts spawn after 366.7 seconds^11000f, delay 166.7 seconds^5000f

Strategies

Strategy 1 (No Gacha)

Lineup: The best set of Attack or Defense Combos you have (Seasons of Love+Three Kings+Lion King recommended), Dragon Cat (unless included in the Combos), Eraser Cat*, Crazed Whale Cat*, Island Cat*, Crazed Dragon Cat, Awakened Bahamut Cat.

*must be at a high level (at least 20+35 for Normal Cats, 30 for Crazed Whale Cat), True Form if possible.

Battle Items: Rich Cat (optional but helpful), Treasure Radar (only if you're sure you can beat the stage).

Start off by deploying some Crazed Whales to stall the Hannya, while also upgrading your Worker Cat to Level 3 or 4.

Bore phase: When the first Bore arrives, use Island and Crazed Whale to stall and continue slowly upgrading your Worker Cat. Killing the Bore before R. Ost arrives is crucial as dealing with them both will be extremely troublesome, so add Crazed Dragon if needed. When the Bore is defeated, continue deploying Crazed Whales and Island Cat to deal some damage to Hannya.

R.Ost phase: When he arrives, stop deploying them, instead spam Eraser and summon Awakened Bahamut, Crazed Dragon and King Dragon to damage the R. Ost, all while continuing to slowly upgrade your Worker Cat. Awakened Bahamut should easily take R. Ost down if timed well. After Bore's death, start sending only Crazed Whales and Island Cats out to damage Hannya. Repeat the above when the Bores and R. Ost arrive and you should be able to win the stage eventually.

Note: Manage your money properly and do not unnecessarily deploy troops, or it may result in your loss.

Variations:

• Crazed Dragon and/or A. Bahamut may be replaced by 1 or 2 adequate Uber Rares, like Pai-Pai Z or Divine Kuu and/or a mid-ranged unit like Cyborg Cat; all that changes is what the bore and R. Ost killers are. Units like Cyborg Cat may work for R. Ost, Kuu is ideal for the Bore, while the likes of Pai-Pai can handle both.
• Eraser Cat can be replaced by other meatshields, as long as they are strong; Maximum the Fighter is the best choice, but Jiangshi Cat and Crazed Wall Cat/Manic Eraser Cat also work, while 75¢ cats do not.
• Recommended Combos could be swapped for Attack-based ones, but 90% of the time it is better to go with strength and defense, as units struggle do reach enemies to deal damage in the first place. The only part where damage is better is the Bore, so only use an Attack Up Combo if the Bore can be stalled but takes too long to die.
• Fried Shrimp Cat/Roe Cat may be added in place of a cat on the first row if a different set of Combos is used or in place of one of the "2 attackers" (Awakened Bahamut Cat and Crazed Dragon Cat), doing so is only recommended if the enemies push so much that the defense isn't enough.
• Lion Cat and other cats that may be here for Combos should never be used, but a fast unit like lion may still be used for quickly reaching Hannya in case of an emergency, it could be better in some cases and worse in others, but it makes little difference.

• Less Combo cats for more variance in the army may be a viable strategy, but it is highly unrecommended unless the units one owns don't allow good enough Combos.

Strategy 2

Lineup: 3 meatshields (Crazed Macho Cat/Manic Mohawk Cat, Manic Eraser Cat and Normal Eraser Cat), Crazed Sexy Legs Cat/Manic Macho Legs, Can Can Cat, Manic Island Cat, iCat, King Dragon Cat, Cyberpunk Cat, Awakened Bahamut Cat.

Items: Sniper the Cat and Rich Cat.

When Hannya approaches, do not summon anything until Bore enters. Just stall the Bore (and Hannya itself) with the anti-Reds and Cyberpunk. Only use A. Bahamut and King Dragon against R. Ost when he arrives. Stall Hannya and R. Ost with Cyberpunk as support while Manic Macho Legs slowly deals damage to them. If lucky, should Bore and R. Ost be defeated before another joins the field, try to get two iCats close to Hannya to perma-freeze it before Hannya attacks back, allowing the other anti-Red attackers to get a hit in, but that is just a small probability.

Strategy 3 (ft. Grandon Mining Corps units)

Lineup: (Cool Japan or Punchpunchpunch! Combo) Power Driller Cat Lv. 10, Manic Eraser Cat Lv. 30, Maximum the Fighter Lv. 40, Manic Island Cat Lv. 30, Power Cutter Cat Lv. 30, Cyborg Cat (or a better option) Lv. 40+.

Items: Rich Cat recommended.

Cat Cannon: Slow Beam vs. R Ost.

Starting phase: Start by deploying Power Cutter to shave off a chunk of Hannya's health.

Bore phase: Wait until the Bore is out of Hannya's range before deploying Manic Eraser, Maximum the Fighter and M Island. Deploy Power Cutter when you have enough cats to hold back the Bore. The objective of this phase is to kill the Bore with while using as little money as possible. You should be able to kill the Bore before R. Ost appears. Use the delay to start dealing damage to Hannya. Power Cutter is excellent in chopping down Hannya's health.

R. Ost phase: This is the harder part. Start deploying M. Eraser, M. Island and Cyborg. Only use Power Driller if R. Ost is away from Hannya's range. If R. Ost starts to push too much, deploy Maximum to improve your defenses. If Bore appears before R. Ost is dead, try to save Power Cutter only until Bore is at the front so you have the possibility of killing Bore before R. Ost. If you are able to beat the R. Ost before Bore appears, then you've probably won the stage. Revert to Bore Phase and cycle through the phases until you win.

Strategy 4 (ft. Tropical Kalisa)

The main idea of this strategy is to knockback Hannya 3 times (thus kill her) before R. Ost reaches you. Lucas IV's video shows a good example, even without using any items.

Possible lineup: Skelecat, Mr. (for Research Up Combo), Luxury Bath Cat (30), Tropical Kalisa Χ or an alternative (25), Awakened Bahamut Cat (30), Manic Erazer Cat (36), Eraser Cat (20+32), Elemental Duelist Cat (40, with Attack Buff Talent lv 1), iCat (30), Roe Cat (35)

Items: Treasure Radar (optional), Rich Cat (optional, just to protect your Treasure Radar), Sniper the Cat (optional, for an easier offense against the R. Ost.)

Cat Cannon: Thunderbolt (Lv. 7+)

The key points of the execution of this strategy:

• Lure the Ginger Snaches and the Bore close enough to your base.
• After the Bore is taken down, as soon as Hannya does her first attack, deploy A. Bahamut.
• Use the Cat Cannon after the first knockback of Hannya.
• It is not done yet after Hannya is dead. You still need to concentrate and kill R. Ost.

Walkthroughs

Walkthrough Video	Player	Notes
	Nurse Wuffa	Less Combos in favor of more meatshields

Trivia

• In the Japanese Version, this is the only Advent Stage whose name does not include the level's difficulty.
• Prior to April 2017 (February 2018 in the English Version), this stage had no known schedule.
• The enemy base's HP is composed of two 666s, believed to be the "Number of the Beast".
• The River Styx is a river from Greek Mythology which makes the boundary between the world of the living and the Underworld. Source and more info.

Gallery

Event Poster (EN)

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Reference

• https://battlecats-db.com/stage/s01117.html