Eldritch Forces/Invasion

: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 Crown 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 stage like the original Eldritch Forces, so using Cat Food to continue or force-closing the app to restart without using energy is not allowed.
==Restrictions==
Rarity: Only Special and Rare
==Battleground==
*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:
**3 Imperator Saels spawn, delay 6.67~10 seconds200f~300f.
==Strategy==
Do not focus on variety: instead, bring as many Cat Combos as you can and the few cats that will allow you to win. Mystic Uril is strongly recommended to slow the boss, as due to her extreme damage, any other approach that relies on tanking Idi:Re or weakening her is doomed to fail. Being a stage, the same restrictions apply here.
===Strategy 1===
Battle: This strategy is simply to whittle Idi down slowly and survive. At the start wait for Idi to spawn, and start spamming Ramen Cats non-stop and your midranger(s) right away to get started. Make sure to watch your cash when you're spamming Ramen, as you'd want to have Jelly Dumpling and Stone up to deal damage to the peons and stall Idi respectively. Spawn and time Jelly whenever possible to deal hefty damage to the peons and Idi, especially Relic Doge. Every time Idi gets knocked back, spawn stone immediately to prevent Idi from killing your entire frontline. Assassin BearCat/Assault C.A.T are there to deal with Gory Black, so send them out to deal with him accordingly, and spawn mushroom to deal with Heavenly Hippoe and Sael. 
If you push too close to the base, try to fall back a bit, as your attackers will eventually clip into the base and potentially get killed, or even trigger the base-hit Saels. Remember that Stone Cat is very reliable at keeping all of the peons from pushing, so use it to make Idi waste her attack when falling back.
===Strategy 2===
Battle: Deploy Li'l Erasers constantly during the whole battle. Idi will approach shortly after the level begins, along with a Relic Doge. An occasional Slime, preferably aided by Thunderbolt, can significantly damage Relic Doges whist chipping Idi and the remaining enemies. Erasers, Ramen and Cameraman can take out the Relic Doges, but it's recommended to add Master Uril as soon as possible if it doesn't starve your funds. He'll be helpful in keeping Idi slowed. When Gory Black arrives, stop spamming Cameraman as you need Assassin BearCat to quickly neutralize him. Both the Heavenly Hippoe and Imperator Sael will require a constant spam of Cameraman and Ramen to consistently stall. If Ururun is on the field, there's no need to spam too many Cameraman, as deploying Ururun will deplete a large amount of your funds and she already provides enough DPS to quickly demolish the three peons. Her KB ability may backfire, so you should reconsider when to deploy Uril in the future. Eventually the endurance battle will draw to a close after depleting all of Idi's HP, after which you can push to the base and finish the stage.
===Strategy 3===
Battle: Right after the boss wave, start spawning Ramen Cat constantly during the whole battle. Jellycat should also be spawned right after Idi attacks. After building a sufficient wall of Ramen Cats, summon a Dancer Cat, and remember to ONLY have 1 Dancer Cat on the field at all times. When Gory black appears, start spamming Assasin BearCat until it is dead. When Heavenly Hippoe and Imperator Sael appear, start spawning in Cameramen until those two are dead. Jellycat should be spawned when too many enemies are on the battlefield or when Idi just attacked and there is an opening. When Idi is strengthened, start to spam Cameraman Cat. This strategy can take a long time, so a Speed Up is recommended. Remember to never fire the cat cannon or you risk losing the stage. After a long fight, Idi should die and your stack should easily defeat the support and beat the base, finishing the stage.
==Walkthrough ==
==Gallery==
EFI.png|Special Stage icon
Legendmap anim000.png|The Invasion stages's spritesheet
==Trivia==
*This is the only Stories of Legend stage to feature Relic Enemies and drop Ammonites.
**This is also the only invasion in Stories of Legend.
*This stage reuses an exclusive theme that is only otherwise heard in The Big Bang, Ape Lord's Revenge and Aku Realms Moon.
==Reference== 
*https://battlecats-db.com/stage/s00048-ex.html
Category:Stories of Legend Stages
Category:Sub-chapter 49 Stages
Category:No Continue Stages
Category:Restriction Stages