Special Stages · Stage 4
Feathergeddon: Swan Song (Brutal)
一石三鳥決戦 神ムズ
Feathergeddon: Swan Song (Brutal) is a Battle Cats stage in Invasion of Poultrio. It costs 200 energy and sends 9 enemy spawn lines — led by Poultrio as the boss — against a 2,000,000 HP enemy base, and clearing it rewards 18,800 XP. Its enemies carry the Black, Red, Alien and Aku traits, so cats that target them do the most work here.
Data updated: 2026-08-31
200Energy Cost
18,800XP Reward
2,000,000Enemy Base HP
5,000Stage Length
20Max Enemies
12.1Difficulty
Enemy spawns (9)
| Enemy | Strength | Count | First Spawn | Respawn | Base HP Trigger | Notes |
|---|---|---|---|---|---|---|
 Doge Dark | 1440% | ∞ | 3.3s | 33.3s~40s | 100% | — |
| Doge Dark | 1440% | 6 | 10.7s | 80s~86.7s | 100% | — |
 Shadow Boxer K | 360% | ∞ | 26.7s | 53.3s~60s | 100% | — |
 Sir Seal | 4800% | 2 | 0s | 6.7s~10s | 100% | — |
 One Horn | 6000% | ∞ | 3.3s | 63.3s~70s | 100% | — |
 Bore Jr. | 180% | ∞ | 100s | 26.7s~33.3s | 100% | — |
 R.Ost | 360% | 1 | 113.3s | — | 100% | — |
 Commander Ostromeda | 200% | 1 | 186.7s | — | 100% | — |
 Poultrio | 100% | 1 | 33.3s | — | 100% | Boss (shockwave) |