Utsubobo Seamount is the fourth stage in Primeval Currents.
- Kory and B.B.Bunny are sent out 6.6 seconds into the battle.
- B.B.Bunnies spawn at a mild rate of one every 3.3~10 seconds.
- Oldhorn will join in after 26.6 seconds.
- Another Kory spawns after 80 seconds.
- Another Oldhorn spawns after 106.6 seconds.
- The last threatening enemy in the stage, Berserkory, will appear after 146.6 seconds.
Lineup: Manic Eraser Cat (40), Thaumaturge Cat (30), Can Can Cat (38+2), Cameraman Cat (50), Zamboney Cat (30), Octopus Cat (44+1), Housewife Cat (29+1), Ultra Delinquent Cat (29+1), Awakened Mina (30), Awakened Bahamut Cat (40)
Cat Cannon: Breakerblast or Normal Cat Cannon
For the entire battle, spawn Octopus Cat whenever you can. Once the first B.B.Bunny starts hitting your base, spawn out a Can Can to kill it, even better if you have Double Bounty talent. Once Kory gets close, spawn Octopus Cat, Awakened Bahamut, and Delinquent; try to time Awakened Bahamut so he is able to get the most hits off, B.B. Bunnies can help with this by stopping his advance. Kory should at least be knockbacked 4-5 times before the Oldhorn gets in front of him, at this point, spawn Awakened Mina or Housewife to finish him while Oldhorn is kept in place with Thaumaturge and Ultra Delinquent. After the first Oldhorn and Kory die, your stack will move forward and Octopus Cat will not be able to be fast enough in order to get to the frontline in time, try to preserve this stack for as long as possible before it's eventual demise, when your stack dies, let Kory walk to your base, then respawn Awakened Bahamut and Octopus Cat and everything else, do as much damage to Kory before he gets knockbacked behind Oldhorn, repeat the same process as before, the Berserkory won't be much of an issue as Octopus Cat will always be able to catch up to your stack in time, so just repeat the same process for him as well until you win the level.