BOSS
HANNYA
Realm of Carnage is the 1st stage of River Styx. Next stage: Wrath of Carnage.
STRATEGY
Hannya's guaranteed Weaken drops your units to 25% attack for five seconds, so your damage vanishes exactly when her support is pushing hardest.
- Kill the Bores and R.Osts fast enough to chip her 1,000,000 HP before the next pair arrives.
- Never let a Bore and an R.Ost stack up together — that combination is close to unstoppable.
- Send anti-Red units at Bore or the boss, and let ranged units deal with R.Ost.
- Higher unit levels matter more here than clever picks; many runs come down to Bahamut timing.
SPAWN ORDER
ENEMY ROSTER · 5
CATS TO BRING 
ISLAND CAT A Combining high stats and the Strong ability against Reds, Island is an excellent but expensive anti-Red attacker that can support other units. 
CRAZED FISH CAT A A faster and cheaper alternative to its normal equivalent, Manic Island is often centric to the stage. At level 40 with True Form and some "Strong" Effect UP Combos, Manic Island can instantly destroy the Ginger Snaches. 
ROE CAT A Can effectively stall Hannya because of their humongous health against Red enemies, doubly so in True Form. Their weaken can also help certain units like Awakened Bahamut Cat or Greater Balrog Cat to tank extra hits, although it is rather unreliable. 
AWAKENED BAHAMUT CAT S Can effectively stall Hannya because of their humongous health against Red enemies, doubly so in True Form. Their weaken can also help certain units like Awakened Bahamut Cat or Greater Balrog Cat to tank extra hits, although it is rather unreliable. 
GREATER BALROG CAT S Can effectively stall Hannya because of their humongous health against Red enemies, doubly so in True Form. Their weaken can also help certain units like Awakened Bahamut Cat or Greater Balrog Cat to tank extra hits, although it is rather unreliable. 
ICAT A iCat requires very good timing and either the Move Speed Up talent or, with luck, Fried Shrimp's weaken to work. With one of these two options, iCat can rush down Hannya and freeze the boss, giving other units time to get more damage in. 
ELEMENTAL DUELIST CAT A Can be a very useful asset in rush strategies if boosted to level 33 or higher, as that allows him to survive a hit from a weakened Hannya. A few of them will tear through Hannya quickly. However, his very low range and poor speed leave too much to be desired if Courier is also available. 
POWER CUTTER CAT A Immune to weaken, extremely fast, survives a lethal strike and strengthens by 400% at 1% health. Quite disposable for how much damage it can easily inflict on the red enemies encountered here. 
LONE CAT AND KITTEN A With Resistance/Knockback/Freeze versus traitless enemies, they can disable R.Ost, and make timing Awakened Bahamut extremely simple. They also come from a very easy Advent Stage that can be cleared before this. 
THE KITTY OF LIBERTY A While its abilities aren't of any use, The Kitty of Liberty functions similarly to a Dragon variant, and can provide some extra firepower against R.Ost. 
CAN CAN CAT A Can Can can crowd-control the Bores and deal good damage to Hannya, it can get double bounty off of Sir Seals. When boosted, it can even hit R.Ost sometimes. 
THE PEACH DEVILS S Can quickly infiltrate into Hannya's range to inflict Freeze, and works well with iCat, despite lacking consistency. They can also provide support against Bore. FISH CAT A Strong Against Red and tanky for the cost — a sturdy anti-Red frontliner. 
BEAN CATS B Knockback and (True) Resist vs Red enemies. 
CARPENTER CAT A Resistant to Red — durable against Red attackers. APPLE CAT A Freezes Red enemies (100% in True Form). 
CAT CLAN HEROES S Weakens and damages Red. BAHAMUT CAT S Huge multi-hit burst — a story-unlock powerhouse that deletes tanky enemies. 
CHILD OF DESTINY PHONO S Big Multi-Hit Massive-Damage bursts from safety. 
GAIA THE CREATOR S Long-Distance multi-hit with Insane Damage — a generalist wall-cracker. 
CRAZED MONEKO A Big crit burst against tanky/Metal targets. 
IZ THE DANCER S Big Multi-Hit Massive-Damage bursts.
★ PICKED FOR THIS STAGE
ISLAND CAT A Combining high stats and the Strong ability against Reds, Island is an excellent but expensive anti-Red attacker that can support other units. CRAZED FISH CAT A A faster and cheaper alternative to its normal equivalent, Manic Island is often centric to the stage. At level 40 with True Form and some "Strong" Effect UP Combos, Manic Island can instantly destroy the Ginger Snaches. ROE CAT A Can effectively stall Hannya because of their humongous health against Red enemies, doubly so in True Form. Their weaken can also help certain units like Awakened Bahamut Cat or Greater Balrog Cat to tank extra hits, although it is rather unreliable. AWAKENED BAHAMUT CAT S Can effectively stall Hannya because of their humongous health against Red enemies, doubly so in True Form. Their weaken can also help certain units like Awakened Bahamut Cat or Greater Balrog Cat to tank extra hits, although it is rather unreliable. GREATER BALROG CAT S Can effectively stall Hannya because of their humongous health against Red enemies, doubly so in True Form. Their weaken can also help certain units like Awakened Bahamut Cat or Greater Balrog Cat to tank extra hits, although it is rather unreliable. ICAT A iCat requires very good timing and either the Move Speed Up talent or, with luck, Fried Shrimp's weaken to work. With one of these two options, iCat can rush down Hannya and freeze the boss, giving other units time to get more damage in. ELEMENTAL DUELIST CAT A Can be a very useful asset in rush strategies if boosted to level 33 or higher, as that allows him to survive a hit from a weakened Hannya. A few of them will tear through Hannya quickly. However, his very low range and poor speed leave too much to be desired if Courier is also available. POWER CUTTER CAT A Immune to weaken, extremely fast, survives a lethal strike and strengthens by 400% at 1% health. Quite disposable for how much damage it can easily inflict on the red enemies encountered here. LONE CAT AND KITTEN A With Resistance/Knockback/Freeze versus traitless enemies, they can disable R.Ost, and make timing Awakened Bahamut extremely simple. They also come from a very easy Advent Stage that can be cleared before this. THE KITTY OF LIBERTY A While its abilities aren't of any use, The Kitty of Liberty functions similarly to a Dragon variant, and can provide some extra firepower against R.Ost. CAN CAN CAT A Can Can can crowd-control the Bores and deal good damage to Hannya, it can get double bounty off of Sir Seals. When boosted, it can even hit R.Ost sometimes. THE PEACH DEVILS S Can quickly infiltrate into Hannya's range to inflict Freeze, and works well with iCat, despite lacking consistency. They can also provide support against Bore. ⚙ More counters worked out from the roster, lower confidence than the picks above; kept for reference
Counter Red
Hannya is Red. Anti-Red units take less damage and deal more.
FISH CAT A Strong Against Red and tanky for the cost — a sturdy anti-Red frontliner. BEAN CATS B Knockback and (True) Resist vs Red enemies. CARPENTER CAT A Resistant to Red — durable against Red attackers. APPLE CAT A Freezes Red enemies (100% in True Form). CAT CLAN HEROES S Weakens and damages Red. Out-range Hannya
Hannya reaches 800 range. Units that out-range it can chip safely without taking hits.
Burst the boss down
Hannya has a deep HP pool (1,000,000+ even before stage magnification). Heavy single-target burst shortens the fight.
BAHAMUT CAT S Huge multi-hit burst — a story-unlock powerhouse that deletes tanky enemies. CHILD OF DESTINY PHONO S Big Multi-Hit Massive-Damage bursts from safety. GAIA THE CREATOR S Long-Distance multi-hit with Insane Damage — a generalist wall-cracker. CRAZED MONEKO A Big crit burst against tanky/Metal targets. IZ THE DANCER S Big Multi-Hit Massive-Damage bursts. VIDEO RUNS
WIKI PICK = listed on the stage's Battle Cats Wiki page; COMMUNITY = found by title, channel and date. Neither is verified by Claws' Den. Nothing loads from YouTube until you press play. Find more on YouTube ↗
ENEMY BASE 
BASE HEALTH
666,666
The castle you destroy to clear the stage.
STAGE DATA
SAGAEvents
CHAPTERRiver Styx
ENEMIES5
DIFFICULTYDeadly
RUNS ON11th, 12th, 25th & 26th of each month
DROP Express Cat · 30%
RESTRICTIONNo Cont
←START OF SAGA
NEXT WRATH OF CARNAGE → MORE IN RIVER STYX All 3 stages