Wrath of Black Hole is the 2nd stage of Dimension of Despair. Previous stage: Black Hole Rising. Next stage: Revenge of Black Hole.
Black Hole Rising with a 300¢ minimum deploy cost: the plan is identical, only the meatshields change.
- Swap the cheap walls for 300¢-plus meatshields such as Rover Cat Mk II or Riceball Cat and run the same crowd-control approach.
Alien/Floating cyclone: 1,499,999 HP and 9,999 area damage every 5f at 240 range, above average for a Cyclone. Its hits can Weaken cats to 10% of their attack, and its attack power doubles at 30% HP. Check your anti-Alien and anti-Floating units' range against its before relying on them.
ROVER CAT MK II A Just use the same strategy you used in Black Hole Rising, but with meatshields that cost at least 300¢, such as Rover Cat Mk II or Riceball Cat. 
RICEBALL CAT S Just use the same strategy you used in Black Hole Rising, but with meatshields that cost at least 300¢, such as Rover Cat Mk II or Riceball Cat. ⚙ More counters worked out from the roster, lower confidence than the picks above; kept for reference
Cosmic Cyclone 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 Cosmic Cyclone.” 
LI'L GROSS CAT B True Form has a 30% Knockback vs Alien. Also fits “Out-range Cosmic Cyclone.” 
BAKERY CAT A Curses Alien enemies. Also fits “Out-range Cosmic Cyclone.” 
LITTLE LEAGUER CAT S Resistant vs Alien and Long Distance — a budget anti-Alien backliner. 
CATMAN S Deals Massive Damage to Alien in every form. Also fits “Counter Floating.” Cosmic Cyclone is Floating. Anti-Floating units take less damage and deal more.
SABER THE CAT C Saber Alter Cat: Strong against Floating enemies (Deals 1.5x damage, only takes 1/2 damage) 
ARCHER CAT A Deals Massive Damage to Floating enemies. Also fits “Out-range Cosmic Cyclone.” 
BODHISATTVA CAT A Slows and (True) Weakens Floating enemies. CATMAN S Massive Damage vs Floating (Normal). Also fits “Counter Alien.” 
HIGH LORD BABEL S Equally tough against Floating enemies, with Colossus Slayer. Cosmic Cyclone reaches 240 range. Units that out-range it can chip safely without taking hits.
GROSS CAT A Range 350 — fires from beyond its 240. Also fits “Counter Alien.” LI'L GROSS CAT B Range 300 — fires from beyond its 240. Also fits “Counter Alien.” 
PHANTOM CAT A Range 360 — fires from beyond its 240. Also fits “Counter Floating.” 
BACKHOE CAT A Range 350 — fires from beyond its 240. CATMAN S Range 440 — fires from beyond its 240. Also fits “Counter Alien.” Cosmic Cyclone has a deep HP pool (1,499,999+ 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. Also fits “Out-range Cosmic Cyclone.” 
GAIA THE CREATOR S Long-Distance multi-hit with Insane Damage — a generalist wall-cracker. Also fits “Out-range Cosmic Cyclone.” 
CRAZED MONEKO A Big crit burst against tanky/Metal targets. 
MIGHTY REKON KORPS S Among the highest single-hit Area damage available. Also fits “Out-range Cosmic Cyclone.” 
The castle you destroy to clear the stage.