Clash of Steel (Merciless) is one of the Continuation Stages that the player can access after beating An Elder Secret (Merciless), the first stage in Growing Strange. Completing this stage yields an Elder Catfruit Seed, or on rare occasions, an Elder Catfruit.
- Metal Doges appear as peons at the beginning.
- Metal One Horn appears after 16.7 seconds.
- When the enemy base is damaged, Sir Metal Seal appears as a boss alongside Super Metal Hippoe and Metal One Horn, with another Metal One Horn appearing after 20 seconds.
Using Uber Rares that can easily stall Metal foes (Poseidon can almost perma-freeze if you stack two and time them correctly (Kaguya and Mitama are also amazing), and slowly kill the enemies using some critical hitters. With this approach, all you really need are meatshields and any critical hitter as support.
Don't waste space on meatshields and only bring one very strong anti-Metal, hoping for RNG and spamming everything your money allows you to spam as meatshields, even units that aren't normally used for this if you have plenty of money.
Using consistent anti-Metal crowd control (preferably Puppetmaster & Charley, talented Lollycat, or some Uber Rare) and try to stack at least 5 Soba Cats at the start and then just spam meatshields and other units for protection afterwards.