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3-17 ALTAIR
3-17 Altair is the 17th stage of Cosmos Ch.3 — Even Stars Burn Out. Previous stage: 3-16 Calabash Nebula. Next stage: 3-18 Sirius.
SPAWN ORDER
TIMED
ENEMY ROSTER · 5
CATS TO CONSIDER 
FENCER CAT A Guaranteed 100% Barrier Breaker at long range — the reliable accessible breaker. 
BORA S 100% Barrier Breaker reliably cracks Star Alien Barriers. Also fits “Counter Alien.” 
LUMINA S 100% Barrier Breaker opens Star Alien Barriers for the team. Also fits “Counter Alien.” 
GRAVI S 100% chance to break Barriers. Also fits “Counter Alien.” 
KOMORI S 100% chance to break Barriers. Also fits “Counter Alien.” 
MIZLI S 100% chance to break Alien Barriers. Also fits “Counter Alien.” 
GROSS CAT A Its True Form is Strong Against Alien, giving budget anti-Alien value. 
LI'L GROSS CAT B True Form has a 30% Knockback vs Alien. Also fits “Break the Barrier.” 
BAKERY CAT A Curses Alien enemies. 
MITER SAW CAT A Resistant to Alien and deals Massive Damage to Alien. Also fits “Break the Barrier.” 
TEKACHI A Resists and dodges Alien attacks. Also fits “Break the Barrier.”
🛡️ Break the Barrier
Le'Solar, UltraBaaBaa and General GreGory carry Barriers (up to 266,000 HP) — your hits are absorbed until it's broken.
UltraBaaBaa's 266,000 Barrier needs a guaranteed 100% Barrier Breaker — chance-based units stall and waste your damage window.
FENCER CAT A Guaranteed 100% Barrier Breaker at long range — the reliable accessible breaker. BORA S 100% Barrier Breaker reliably cracks Star Alien Barriers. Also fits “Counter Alien.” LUMINA S 100% Barrier Breaker opens Star Alien Barriers for the team. Also fits “Counter Alien.” GRAVI S 100% chance to break Barriers. Also fits “Counter Alien.” KOMORI S 100% chance to break Barriers. Also fits “Counter Alien.” MIZLI S 100% chance to break Alien Barriers. Also fits “Counter Alien.” ↓ BACKUP — WON'T RELIABLY WORK HERE
🎯 Counter Alien
Le'Solar, Mesocosmocyclone, UltraBaaBaa and General GreGory are 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. LI'L GROSS CAT B True Form has a 30% Knockback vs Alien. Also fits “Break the Barrier.” BAKERY CAT A Curses Alien enemies. MITER SAW CAT A Resistant to Alien and deals Massive Damage to Alien. Also fits “Break the Barrier.” TEKACHI A Resists and dodges Alien attacks. Also fits “Break the Barrier.” STRATEGY
Mesocosmocyclone hits at 5-frame attack rate (extreme DPS) and Warps FORWARD. Crowd-control with Seafarer Cat or Corrupted Psychocat; ELEMENTAL PIXIES Ubers are ideal.
ENEMY BASE 
BASE HEALTH
490,000
The castle you destroy to clear the stage.
STAGE DATA
SAGACats of the Cosmos
CHAPTERCosmos Ch.3 — Even Stars Burn Out
ENEMIES5
TREASUREHawk
RESTRICTIONMax 20