3-47 BLACK HOLE
3-47 Black Hole is the 47th stage of Cosmos Ch.3 — Even Stars Burn Out. Previous stage: 3-46 Andromeda. Next stage: 3-48 The Big Bang.
Axoloty carries a Barrier (up to 10,000 HP) — your hits are absorbed until it's broken.
LI'L GROSS CAT B 30% Barrier Breaker. Also fits “Counter Alien.” 
SPACE CAT A 50% Barrier Breaker. Also fits “Out-range Shibalien Elite.” 
FENCER CAT A Guaranteed 100% Barrier Breaker at long range — the reliable accessible breaker. Also fits “Out-range Shibalien Elite.” 
MIZLI S 100% chance to break Alien Barriers. Also fits “Counter Alien.” 
LUMINA S 100% Barrier Breaker opens Star Alien Barriers for the team. Also fits “Counter Alien.” 
SKIRT CAT B 30% Barrier Breaker. Also fits “Out-range Shibalien Elite.” Shibalien Elite is Alien. Anti-Alien units take less damage and deal more.
GROSS CAT A Its True Form is Strong Against Alien, giving budget anti-Alien value. Also fits “Out-range Shibalien Elite.” LI'L GROSS CAT B True Form has a 30% Knockback vs Alien. Also fits “Break the Barrier.” 
BAKERY CAT A Curses Alien enemies. Also fits “Out-range Shibalien Elite.” 
LITTLE LEAGUER CAT S Resistant vs Alien and Long Distance — a budget anti-Alien backliner. Also fits “Break the Barrier.” MIZLI S KB, Slow, Resistant and Barrier break all vs Alien. Also fits “Break the Barrier.” Shibalien Elite reaches 120 range. Units that out-range it can chip safely without taking hits.
GROSS CAT A Range 350 — fires from beyond its 120. Also fits “Counter Alien.” LI'L GROSS CAT B Range 300 — fires from beyond its 120. Also fits “Break the Barrier.” 
PSYCHOCAT A Range 365 — fires from beyond its 120. Also fits “Counter Alien.” 
CAT TOASTER A Range 330 — fires from beyond its 120. Also fits “Break the Barrier.” MIZLI S Range 450 — fires from beyond its 120. Also fits “Break the Barrier.” Axoloty fires a single 40,000-damage hit + 100% Lv.10 Wave Attack. Extremely long backswing — knock him back during foreswing to interrupt; high-DPS Anti-Aliens kill him before the attack lands.
Endgame. Community-named 'the real CotC final boss' — players regularly report finding this harder than 3-48 Big Bang itself. Magnifications jump to 2500%, and the restrictions remain unforgiving. Mesocosmocyclones become lineup-deleting; Star Pengs hit like trucks; Weyland's barrier needs a guaranteed Barrier Breaker or your DPS bounces. Standard endgame loadout: Crazed Bahamut + A. Bahamut combo (talented A. Bahamut chains knockbacks while Crazed Bahamut tanks Mesocosmocyclone pressure) → Anti-Alien LR (Lumina, Awakened Mohawk, or Bazifenix) → Manic Eraser/Manic Lion for fast meatshield rotation → at least one Uber with guaranteed Barrier Breaker (Ganglion, Kalisa, or a talented Crazed Cat). r/battlecats: 'if you can clear this, the rest of CotC is downhill.'
The castle you destroy to clear the stage.