Servant of Darkness

Servant of Darkness (異界のしもべ, Ikai no Shimo Be, lit. "Servant of the Otherworld") is one of the first three Empress' Research maps, alongside Arcane Confluence and Demon's Park. It has four stages and disappears for the rest of the day after clearing one, so it will take at least 4 days to clear the whole map. Once completed, the Wicked Tank event will be unlocked.

List of Stages

	English Version	Japanese Version	Translation	Energy Cost
Stage 1	Dimension Rift	次元の裂け目 (Jigen no Sakeme)	Dimensional Rift	100
Stage 2	Ultramarine Castle	禍々しき群青の城 (Magamagashiki Gunjō no Shiro)	Castle of Ultramarine Unluck	100
Stage 3	Dangerous Backwater	禁忌の僻地 (Kinki no Hekichi)	Forbidden Backcountry	100
Stage 4	Sinister Wasteland	異界砂漠 (Ikai Sabaku)	Otherworldly Desert	100

Missions

Mission	Reward
Empress' Research 2: Agents of Aku Clear "Servant of Darkness" and "Wicked Tank"	50 Cat Food
Complete all Empress' Research 1~3 missions!	50 Cat Food

Schedule

Schedule for Servant of Darkness and Wicked Tank

Day of the Week	Available Time (Local)
Monday, Friday	12:00 ~ 13:00
Tuesday, Saturday	19:00 ~ 20:00
Wednesday, Sunday	22:00 ~ 23:00
Thursday	08:00 ~ 09:00

First Appearance

English Version

August 26th, 2021

Japanese Version

August 1st, 2021

Reference

https://battlecats-db.com/stage/s01256.html

Special Stages

Daily Stages
Normal Stages	Monday Stage (Rich Cat) • Tuesday Stage (Speed Cat) • Wednesday Stage (Cat Jobs) • Thursday Stage (Sniper Cat) • Friday Stage (Helpful Cat) • Weekend Stage
Blitz Stages	Monday Blitz Stage • Tuesday Blitz Stage• Wednesday Blitz Stage • Thursday Blitz Stage • Friday Blitz Stage

Guerrilla Stages
Cat Ticket Guerrilla	Love, Metal Hippoe (Hard) • Super Metal Hippoe (Expert) • Steel Visage (Deadly) • Forged to Kill (Deadly)
XP Guerrilla	XP Stage/Weekend Stage • XP Megablitz! • XP Colosseum • Merciless XP! • The Proving Grounds (First Round (Easy) • First Round (Expert) • First Round (Deadly))
Catfruit Guerrilla	Growing Green (I • II • III) • Growing Purple (I • II • III) • Growing Red (I • II • III) • Growing Blue (I • II • III) • Growing Yellow (I • II • III) • Growing Strange (I • Red • Floating • Black • Angel • Alien • Metal • Zombie) • Growing Epic (I • II) • Growing Evil (I • II • III • IV) • Catfruit Jubilee • Catfruit Buffet
Behemoth Stones	Hidden Forest of Gapra (The Strongest Behemoth) Ashvini Desert (Venomous Duck) Jinfore Volcano (Two Great Shadows)
Material Guerrilla	Cavern of Comets (I • II • III) • Island of Ash (I • II • III) • Strait of Wings (I • II • III)
Enigma Guerrilla	Isle of the Map Lord (I • II • III)

Cyclone Stages
Solo Fights	Attack on R-Cyclone (Expert) • Attack on B-Cyclone (Expert) • Attack on W-Cyclone (Expert) • Oncoming Maelstrom (Expert) • Attack on Titanium (Insane) • Black Hole Rising (Insane) • Oncoming Storm (Insane) • Unholy Tempest (Insane) • The Wormhole Opens (Deadly) • Charybdis' Mouth (Merciless) • Wrath of Hell (Deadly)
Dual Fights	Bad to Worse (Tragedy in Red (Insane) • Doom Paradise (Insane)) • Day of Judgement (Explosion in the Sky (Insane) • Acts of Cat-God (Insane)) • Techneurosis (Nuts 'n' Bolts (Expert) • Space is the Place (Insane))

Advent Stages
Solo Fights	Tier 1	No Plan A (Deadly) • Realm of Carnage (Deadly) • Honey Trap (Deadly) • Parade of the Dead (Deadly) • N-1 Grand Prix (Deadly) • Bombergirl (Deadly) • Puffer Planet (Merciless) • Flow Like the Stream (Merciless) • Possessed by Evil (Merciless) • Aku Reincarnation (Merciless)
Solo Fights	Tier 2	The Pure Land (Merciless) • Saintly Sister (Merciless) • I'll Be Bug (Merciless) • Dogsville (Merciless) • Last of the Dead (Merciless) • Baby Fake (Merciless)
Dual Fights		The Angel & The Demon (No Plan A (Deadly) • Realm of Carnage (Deadly)) • The Queen & The Dead (Honey Trap (Deadly) • Parade of the Dead (Deadly)) • The King & The Maiden (N-1 Grand Prix (Deadly) • Bombergirl (Deadly)) • The Dead & The Bloated (Parade of the Dead (Deadly) • Puffer Planet (Merciless)) • The Queen & The Maiden (Honey Trap (Deadly) • Bombergirl (Deadly)) The King & The Angel (N-1 Grand Prix (Deadly) • No Plan A (Deadly))

Crazed Stages
Crazed Cats	Dark Souls (Insane) • Absolute Defence (Insane) • Berserk (Insane) • Festival Gross (Insane) • Head Shaker (Insane) • Flappy Cat (Insane) • Fish Hell (Insane) • Mammals? (Insane) • Crazy Cats (Insane)
Manic Cats	Deathhawk (Deadly) • Vulcanizer (Deadly) • Unjust War (Deadly) • Muscle Party (Deadly) • Lots O' Lion (Deadly) • Forest Beasts (Deadly) • Ogre Island (Deadly) • Draconian (Deadly) • Resident Feline (Deadly)
Clan of the Maniacs	The Wild Dance (Deadly) • Insane Rhythms (Merciless)

Awakening Stages
Buyable Cats	Actress Awakens • Kung-Fu Awakens • Mr. Awakens • Bondage Awakens • The Dom Awakens • Box Cats Awaken • Panties Awakens • Ninja Awakens • Zombie Awakens • Samurai Awakens • Sumo Awakens • Boogie Awakens • Skirt Awakens
Monthly Cats	Adult Cat Awakes • Evil Cat Awakes • Doll Cats Awake • Maiden Awakes • Koi Awakens • Bride Awakens • Vacation Awakes • Vengeance Awakes • Kung-Fu X Awakens • Sports Day Awakens • Salaryman Awakes • Reindeer Fish Awakens
Li'l Cats	Tiny Meows (Deadly) • Tiny Will (Deadly) • Tiny Chopper (Deadly) • Tiny Creeper (Deadly) • Tiny Horns (Deadly) • Tiny Wings (Deadly) • Tiny Fins (Deadly) • Tiny Tail (Deadly) • Tiny Fists (Deadly)
Cyclone Cats	Crimson Vengeance • NEO Darkness Heaven • Peerless Too • Wrath of the Divine • Bitter Irony • Dimension of Delirium • Red Sky At Night • The Dead Keep Rolling • The 3rd Dimension
Advent Cats	Clionel Dominant • River Acheron • Queen's Condemnation Dead by Encore • King Wahwah's Return • A Deeper Dream • Courts of Agony
Other Cats	Tricycle Awakens • Cat Kart Awakens • Flower Cat Awakens! • Nekondo Awakens • Catburger Awakens

Event All-Stars Stages
Special Thanks! (Insane) • Ultra Stress! (Insane) • Miracle Tactics! (Insane) • Wonderful Conquest (Insane) • Elite Corps (Insane) • Megaton Blast (Insane) • Presents of Mind (Insane)

Memorial Stages
Year's First Dawn • Happy Birthday (I • II • III) • Grats! 3 Years!! • Joy of 20 Million! • Joy of 30 Million! • Joy of 40 Million! • CAT DAY • Year of the Rat • Joy & Prosperity • Joy of 50 Million! • Joy of 60 Million! • Joy of 70 Million! • Golden Week Special!! • Joy of 60 Million! • Q1. Box of Contents Quiz • Q5. Time Luck Quiz • Happy Nyanko Festival

Region Restriction
Punchy Prizefighter • Secret Delicacy • Faster Than Fast Food • We're Number One • Cola Flavor Cat • Wafer Cat Advent

Unknown Schedule
Dark Descent	I: Eastern Cave • II: Western Walk • III: Southern Fort • ∞: Northern Crater • Cover of Darkness
Seeing Red	I: Sands of the East • II: Wastes of the West • III: Peaks of the South • ∞: Ruins of the North • 烈火の乱
Duel Stages	Duel on the Prairie (Vanguard • Elite • Commander) • Duel at Sunset (Vanguard • Elite • Commander) • Duel Under the Stars (Vanguard • Elite • Commander) • Duel on the Dunes (Vanguard • Elite • Commander) • Duel at the Lava Fields (Vanguard • Elite • Commander) • Duel Under the Sea (Vanguard • Elite • Commander)
Tag Arena	Rookie (Quarterfinals • Semifinals • Finals) • Beginner (Quarterfinals • Semifinals • Finals) • Adept (Quarterfinals • Semifinals • Finals) • Pro (Quarterfinals • Semifinals • Finals) • Expert (Quarterfinals • Semifinals • Finals)
Total Wars	Spring Special (Basic • Standard • Advanced • Exalted • Supreme) • Summer Special (Basic • Standard • Advanced • Exalted • Supreme) • Fall Special (Basic • Standard • Advanced • Exalted • Supreme) • Winter Special (Basic • Standard • Advanced • Exalted • Supreme)
Deadly Carnival	Tornado Carnival (Deadly) • Awakened Carnival (Deadly)
Deadly Carnival II	Tornado Carnival II (Deadly) • Awakened Carnival II (Deadly)
Deadly Carnival III	Tornado Carnival III (Deadly) • Awakened Carnival III (Deadly)
Heavenly Tower	Floor 1 • Floor 2 • Floor 3 • Floor 4 • Floor 5 • Floor 6 • Floor 7 • Floor 8 • Floor 9 • Floor 10 • Floor 11 • Floor 12 • Floor 13 • Floor 14 • Floor 15 • Floor 16 • Floor 17 • Floor 18 • Floor 19 • Floor 20 • Floor 21 • Floor 22 • Floor 23 • Floor 24 • Floor 25 • Floor 26 • Floor 27 • Floor 28 • Floor 29 • Floor 30 • Floor 31 • Floor 32 • Floor 33 • Floor 34 • Floor 35 • Floor 36 • Floor 37 • Floor 38 • Floor 39 • Floor 40 • Floor 41 • Floor 42 • Floor 43 • Floor 44 • Floor 45 • Floor 46 • Floor 47 • Floor 48 • Floor 49 • Floor 50
Legend Quest	LEVEL 1 - LAST LEVEL (randomized SoL stages & lineups)
Citadels	Floor 1 • Floor 2 • Floor 3 • Floor 4 • Floor 5 • Floor 6 • Floor 7 • Floor 8 • Floor 9 • Top Floor
Infernal Tower	Floor 1 • Floor 2 • Floor 3 • Floor 4 • Floor 5 • Floor 6 • Floor 7 • Floor 8 • Floor 9 • Floor 10 • Floor 11 • Floor 12 • Floor 13 • Floor 14 • Floor 15 • Floor 16 • Floor 17 • Floor 18 • Floor 19 • Floor 20 • Floor 21 • Floor 22 • Floor 23 • Floor 24 • Floor 25 • Floor 26 • Floor 27 • Floor 28 • Floor 29 • Floor 30

Gauntlet Stages
General	Baron Seal Strikes	Baron Seal Strikes: Red Alerts 1~20
	Le'Grim Strikes	Le'Grim Strikes: Rampage Lv1~20
	Mega Menace	Mega Menace: On Mighty Wings Lv1~20
	Horrorpotamus	Horrorpotamus: Cosmic Juggernaut Lv.1~20
	Divine Archangel Strikes	Divine Archangel Strikes: Blessing Lv.1~20
	Big Peng Z Strikes	Big Peng Z Strikes: Wandering Lv.1~20
Seasonal		A Colossal New Year! • A Colossal Valentine's • Suffering Spring! • Summer Break Cats • A Colossal New Year! (2021) • Festival Nyanko ~Chinese New Year Edition~ • Horde of Cats • Attack of the Lonely Hearts • Season 1: School Days • Monthly Event All-Stars Grateful Gathering
Monthly		January Gauntlet • January Gauntlet II • February Gauntlet • February Gauntlet II • March Gauntlet • March Gauntlet II • April Gauntlet • April Gauntlet II • May Gauntlet • May Gauntlet II • June Gauntlet • June Gauntlet II • July Gauntlet • July Gauntlet II • August Gauntlet • August Gauntlet II • September Gauntlet • September Gauntlet II • October Gauntlet • October Gauntlet II • November Gauntlet • November Gauntlet II • December Gauntlet • December Gauntlet II

Other Special Stages
The Battle Cats POP!	Poppin' in 3D! • Fight your Friends! • Player VS Player • Pay Only Once! • No I-A-P! • Get Those Ubers • Conquer the Galaxy • But the App's Fun Too :)
Mystery Package	Sender Unknown
BitSummit_{BCJP Only}	Held in Miyako Messe! (2016) • Held in Miyako Messe! (2017) • Held in Miyako Messe! (2018) • One more thing... (2018) • Held in Miyako Messe! (2019) • One more thing... (2019)
Crazed Moneko	in JAPAN • in LONDON • in NEW YORK • in THE MOON
The Battle Cats Together!	Play Battle Cats Together! • Team Up & Win! • Over 350 Cats! • Play All You Want! • Legend Stages Too! • Minigames Galore! • At the Nintendo eShop! • But the App's Fun Too :)
Most Defeated 2019	Surprising #5 • Not Uncommon #4 • As Expected #3 • Runner-Up #2 • Unbelievable #1 • Unseen in 2019
Most Appearances 2020	Congrats on #5 • #4 As Expected • Somehow #3 • #2 Out of Nowhere • #1 Thanks to You! • No New Appearances
Top 5 Most Seen Enemies, 2021!	#5 Sliding • #4 Blushing • #3 That's Right • #2 Good Try • #1 Triple Crown • Unseen
Empress' Research	Arcane Confluence • Servant of Darkness • Demon's Park • Wicked Cat • Wicked Tank • Wicked Axe
Empress' Report	Empress' Report 1 • Empress' Report 2 • Empress' Report 3 • Empress' Report 4 • Empress' Report 5
Empress' Excavation	Empress' Excavation 1 • Empress' Excavation 2
New Year's Bling	Long-Awaited Gifts • Today Only: Sociable • Where's My Money, Mom? • Brotherly Income Gap • Increasing Sums • Gifting Burden • Grandpa's Lettering • No Gift This Year
From	From Your Junior • From Your Senpai • From A Childhood Friend
Season 2: Heartbeat Festival	No Sleep For Days • Cafe Coworkers • Hands on the Check • Miscalculated Bill • Day's End Chime • School Festival Cleanup
Season 3: Field Trip	Long-Awaited Trip • Impulse Souvenir • Out-of-Season Bloom • The Great Pillow Fight • In-Flight Slumber • Sudden Call From Your Crush
Weekend: Confession	Weekend: Confession • Weekend: Confession • Weekend: Confession
Season 4: Graduation Day	Waiting at the Spot • Rising Heart Rate • She Actually Came?! • One Brave Step • Scattered Sakura • Moral Support • Unheard Confession • No Longer Single?