New biome and a special enemy

I had an idea for a biome idea that is a frozen biome with ice that you can slide around on but enemies can also slide on it aswell making for whacky encounters and in this frozen biome is a lost army of walking mechanical cavelings that are relics of a forgotten time. The robots gained self awareness and have become hostile towards everything but are locked to the ice biome as a twist of fate if they follow the player out of the wintery kingdoms they will begin to glow bright red and go thermo exploding violently into nuts and bolts and destroying the player. While a winter biome might sound cliche I still like the idea of a freezing biome that isn't just exclusive to the Christmas event. And I thought robot cavelings that would overheat and explode if they left their biome was a funny idea.