Seas of Death (Merciless) is one of the possible follow-up stages that the player can access after completing An Elder Secret (Merciless), the first stage in Growing Strange. Completing this stage yields an Elder Catfruit Seed, with a very small chance of an Elder Catfruit. This stage is based around Zombie Enemies.
- 6 Coffin Zoges appear in this stage. The first spawns after 3 seconds, and the rest spawn after 20 seconds each.
- Zoge appears as a peon.
- The boss, Zamelle, appears after 23 seconds.
- Zackie Peng and Zomboe appear as support.
- Zang Roo is spawned after 93 seconds.
- After 160 seconds have passed, a second Zang Roo will spawn.
This is the only stage where the boss comes out on a timer out of the Growing strange levels; for this reason, luring or delaying is a bad idea, especially because the zombies may take down your base by burrowing (Zamelle does not burrow, but it has base destroyer, which is even worse than burrowing).
You have to use Z. Killers here, otherwise you aren't going to have an enjoyable time. To make things worse, these Z. Killers have to take down Zamelle, meaning that Poseidon, Inspector Gabriel, Armageddon, Polevaulter and the rare zombie killers won't be able to do much because of the amount of damage required for a knockback, meaning that you, basically have to either have Sarukani or Baseball Mask Y and let them deal some damage between Zamelle's attacks or you have to use tanky Z. Killer ubers. There is also the alternative of dealing a very precise amount of damage and finishing it off with Hyper Mr, but this is not recommended.
For the rest, not much else that you may not already have in your lineup is required.