Battle Cats Wiki
Battle Cats Wiki
This stage has no official name.

Eldritch Forces Invasion is a special stage that appears in ★★★★ Laboratory of Relics after clearing all Stories of Legend sub-chapters on all star difficulties, much like a Zombie Outbreak or Filibuster Invasion. Upon completion, Eldritch Forces will be back to normal and Idi:N will be unlocked. This is a No Continues like the the original, uninvaded stage Eldritch Forces, so using Cat Food to continue is not allowed.


Rarity: Only Special and Rare


  • 1 Idi:Re spawns as the boss after 13.33 seconds400f.
  • Infinite Relic Doges spawn after 20 seconds600f, delay 140~143.33 seconds4,200f~4,300f.
  • Infinite Gory Blacks spawn after 43.3 seconds1,300f, delay 140~143.33 seconds4,200f~4,300f.
  • Infinite Heavenly Hippoes spawn after 66.67 seconds2,000f, delay 140~143.33 seconds4,200f~4,300f.
  • Infinite Relic Doges spawn after 90 seconds2,700f, delay 140~143.33 seconds4,200f~4,300f.
  • Infinite Gory Blacks spawn after 113.33 seconds3,400f, delay 140~143.33 seconds4,200f~4,300f.
  • Infinite Heavenly Hippoes spawn after 136.67 seconds4,100f, delay 140~143.33 seconds4,200f~4,300f.
  • Infinite Imperator Saels spawn after 160 seconds4,800f, delay 80~83.33 seconds2,400f~2,500f.
  • When the base reaches 99% HP:


Do not focus on variety: instead, bring as many combos as you can and the few cats that will allow you to win. Master Uril is strongly recommended, as any other approach that relies on tanking Idi:Re or weakening it is doomed to fail.

Strategy 1

Lineup: various basic combos (attack, worker, research, defence etc.), Cameraman Cat, Ramen Cat, Slime Cat, two more cats of your choice (at least another meatshield unless using research combos). Use the Thunderbolt Cannon. Rich cat is also highly recommenced as there are very few money sources.

Battle: start by summoning the fastest unit you have and start spamming Ramen. You should quickly have a solid line of defense, so add Cameramen too and upgrade the worker to level 3. From now on, the fight should almost be a stalemate. The enemies will push every once in a while, so you need to use Slime, by either spamming him or timing him, to allow his powerful waves to hit the enemy peons. You should also use the Thunderbolt to freeze Idi and give Slime the chance to deliver a free hit. If the last unit is Uril or talented Rodeo, use them only when Idi is in the half of the battlefield closer to the Cat Base. It may take a couple of attempts to get used to the timings, but, unless the units are under-levelled (which should be impossible, considering the requirements to reach this stage) or the last unit picked is a useless one, like Modern Cat, this stage should go down relatively easily.


Video Player Notes

Battle Cats - Idi-N

Zerp Ft. Legends

The Battle Cats - Vs Idi (ft. Medusa Cat)

LordBlu Medusa Cat

The Battle Cats - Idi-Re (Eldritch Forces Invasion)

Anthony89810 No Legends

One Cycle Idi is no longer a dream.

Pan Dango Extreme timing, ft. Capsule Cat



  • This is the only Stories of Legend stage to feature Relic Enemies and drop Ammonites.
  • This stage has a unique background.
  • This is the only stage that drops a Legend Cat that has a restriction (Only Special and Rare units).
  • This is the fourth stage to have a special feature in its stage select box, this having a space-like background, the first being the Zombie Outbreaks, the second being PPAP with a special font and the third being the Filibuster Invasion with a similar space themed background.


Stories of Legend Stages
The Legend Begins EarthshakerReturn of TerrorSunset BluesMelancholy DampBouncy ParkGentle SmileGuardian of the RanchSleeping Lion
Passion Land NyandaluciaPaella FieldFlamenco HoleSangria RiverGazpacho HighlandChurros NightBone Dry GardensTapas Desert
Glucosamine Desert Chondroitin SandhillSesamin RuinsIsoflavone CaveCatechin HillLycopene SunsetPropolis OasisPeptide snowfieldHyaluronan Mountain
Swimming Cats Premature LaunchDeep Ocean BlueMermaid CoveChaos LagoonPlaying PiratesFisherman's DilemmaSeaweed ShallowsSalty is Seawater
Risqué Terrain Lovely MineralsShapely CavernsEnticing TunnelsSquishy HollowsTwin PeaksThriller Bridge
Western Street Gunman's DawnCowboy HavenWanted NightMacaroni TownWandering TravelerDisappointed GuardCowboy MountainRodeo Night
Sea of Tuna Red Tuna CoastFresh WharfBlue OceanCarapaccio WatersEconomic SeaTactical War TunaFrozen Tuna FrontCave Fillet
Bamboo Island Prickly FieldBamboo CoastSerial Killer JungleDisgusting SwampDumpy CaveStardust StreetMushroom CliffFrontier Spirit
Squishy Cave Milky TunnelFluffy Dark WeaponMural of the DevilThe Wind BlowsJuvenile KillerUpset RockFlooded CaveChubby B. Goode
Volkanos Volcano Hot Bath RockGentle GeyserThick MagmaFire CageVolcanic DefenderFlame Caldera
Neverending Cat Story Potential RoadGloomy TreeA Song in the WindPhilosophy RoadFrontier BellRiver of TearsShining RoadThe Trial Deep
Castle of Fish The Sea WhispersRipples IslandOctopus SeaPoseidon RestMoonlight BeachCoral Coral ReefArk of the MonthKiller Sardines
Sushi Island Tuna FieldCrab FieldSalmon CaveSea Urchin CaveCaviar WoodsNatto BayHalibut ForestShrimp Frontier
The Scratching Post Cardboard CorridorCatnip DreamCrunchy WallWading WoodchipsCrunchy PillarDisapproving Giant
Parthenon Altar of ZeusSword of AchillesRoad of ErosDawn of GaiaGates of AphroditeLabyrinth of Hades
Low Tide Beach Clammy CoveBeached MammalsBikini TerritoryApple Bobbing OceanParasol FieldAncient One-PieceGlassy SandsStar Ocean
Alcatraz Gull CoastPelican IslandUnderground BaseVillains JungleChicken GameCat TrialPrison PrairieJailer in the Morgue
Jail Break Tunnel Sin and PunishmentPrison SentenceHarry TunnelDead FallsPitfall ZoneThe Great Escaper
Capone's Jail Jailbreak DiaryLast GangPrison DestructionKing of FreedomLiar's FatePigpen Taboo
Silk Road Gandara's RestUtopia is Over ThereGodiego PassMonkey MagicOutsider's GateMarco Po RoadPig SwillImp's cold sweat
Stairway to Darkness Safe and Not SorryClaustronyctophobiaRed AlertPitfalls of LifeSubtle CurfewUnderground
Prince of Darkness The Red CarpetThe BathroomThe VIP RoomTorture RoomDictator's GardenSatan's Bedroom
Dead End Night Feast of BetrayalCatharsis' EndBlack PremonitionBroken MaskAgape's CageSaint Red Fox
Battle Royale Her Highness, Milk T.Angry FightingThe Horrible SongTrap of CowardsDark NemesisScent of Gore & Fish
Scars of War Valkyrie PlainsMinefieldKugel SchreiberMuddy TrenchSniper JungleSunset SoldierFather's BackWinning Back
Sea Polluter Oil PlatformSweat and AldehydeAncient TrialI'm onto youLittering CoastBenzene FieldGovernment WatchdogRevolving-door Floats
Body & Soul Sunset's HowlGestalt, DecayWarrior's DawnCursed BlizzardsSign of the CatOut of DespairMetabolic SyndromeLove and Death
Weak & Mildly Acidic At Least I'm a CatKnights of the RoundCat CatharsisBeautiful FinaleNo More Bad DreamsLearned to Love
Intrepid Cats Renewed ConflictMysterious OrderBirdwatchingThorny DialogueDarkweb
Shadow Cosmopolis Hungry ForestOverachiever CentralMorning Rush HourDocking MassacreSubterranean StalkerLord of the Abyss
Galapa-Goth DNA & DHATwilight PoachersSurviving HerdAlien EcologyHeavenly CreaturesConservation Society
Kombu Cape Rinrin ShelterbeltIberian PlainsWeeping DunesGolden GaiLeadfoot DriveTrouble at the Mansion
Axis of Evil Pecking OrderTechnocracyMerciless OnslaughtCelestial SeasClose EncountersThe Spy Who Pet Me
Suburbs of the Dead Home Sweet MausoleumSwamp of SacrificeDungeon of DreamsRevenant RoadGhostlight GardensSilenced Meowing
Quarantine Isles Virus SmugglersBionic SeaweedAncestral WaysHigh WatchtowerTunafish TrenchesThe Infected King
Mouseyland Greeter at the GatesRickety CoasterVirtual Nightmare50 Degrees HotterIrresistable HenhouseThe Haunted 1LDK
Walk of Fame Paparazzi ParadiseGossip RagsBeverly Hills ScoopLovechild LaneSaucy ScandalsMultiversal Studios
Cutpurse Coast Swim MeetSea Breeze SalonDeep Sea DyingProcrastinator ParadeGrand ExhibitionNo Return Flights
Above & Below Electric BathBoiling SpringMineral TreatmentSoap ScumThe Sauna CrewSteamed to Death
Windless Island Narrow DocksRomantic HighwayDrunken BackrubGulag of LovePerfume RoomHouses of the Holy
IT Catacombs Caliban's KeeperDial-Up DreamsThrone of PhoneOS GraveyardThe Holy ExploitBroadband Omens
Grotesque Gallery Cubist CrimesSurrealist SinsGouache GhoulsDeath by DadaBaroque BeastsAtrocious Deco
Area 22 Roswell IncidentCat AbductionAdamski TypeChupacabra LoveTunguska EventOffworld Weary
Beyond the Savannah Eat the WeakNikumanjaroThe Noble TribeDry SeasonElectrosafariHeaven's Oasis
Blizzard Boulevard Shiver JunctionLeaky TunnelFrostbite ParkToasty TurnpikeSleepy SignalsScorched Tollbooth
Singularityville Ubiquitous SalesVirtual HarvestWearable Homes8K FertilizerBlockchain TwilightHaunted Genome
Ends of the Earth Ultimate ShrineValley of the EndFinal TowerLast LabyrinthCave ConclusionApocalypse Temple
The Legend Ends A Day of ReckoningThirst for VengeanceGlory of GloriesA Moment of SerenityFalse ResurrectionGoblet of the OathTwilight ZephyrUnkept Promises
Laboratory of Relics Eldritch Forces (Invasion)