Immortal Zenith is the sixth and final stage in Behemoth's Peak. Ultima Beast Naala resides here and can be unlocked as Elder Beast Naala at a 3% chance when beating the stage (guaranteed if a Treasure Radar is used).
- 5 Owlbrows spawn after 3.33 seconds100f, delay 43.33~46.67 seconds1,300f~1,400f.
- Infinite Ginger Snaches spawn after 10 seconds300f, delay 30~36.67 seconds900f~1,100f.
- 1 Ultima Beast Naala spawns as the boss after 26.67 seconds800f.
- 5 Aku Doges spawn after 30 seconds900f, delay 40~46.67 seconds1,200f~1,400f.
- 3 Angelic Gories spawn after 86.67 seconds2,600f, delay 53.33~60 seconds1,600f~1,800f.
- Infinite Aku Doges spawn after 333.33 seconds10,000f, delay 40~46.67 seconds1,200f~1,400f.
- Infinite Angelic Gories spawn after 366.67 seconds11,000f, delay 53.33~60 seconds1,600f~1,800f.
- When the base reaches 75% HP:
- 2 Angelic Gories spawn, delay 0.67 seconds20f.
Because of the fact that Ultima Beast Naala attacks in a way that allows it to be stalled easily, the main threat of this stage ends up being the Angelic Gories instead. That being said, players should have a good amount of anti-Angel units in their lineup to minimize this stage's difficulty. Be careful if you use Ramen Cat however, as Naala's long distance attacks can heavily damage them regardless of whether or not you have its resist curse talent.
Strategy 1 (Ft. Headmaster Cat Jobs)
Items: Rich Cat
Spawn a Slime Cat right away, and a second one as soon as possible. Your goal here is to kill Owlbrow before Ultima Beast Naala spawns. You'll need a bit of extra damage so spawn Fishman to finish it off. After that, lure Naala to your base and spawn Doron and then Headmaster Cat Jobs. While Naala is frozen, spam everything you have besides Wrestling Cat. Naala will become unfrozen and unweakened for a brief moment so use your Thundebolt during that time. If all goes well, you should leave Naala close to its death so all that's left is to fend off the first Angelic Gory and finish him off right afterwards. Just be careful with the 2 extra Angelic Gories hiding in the base.