: Use a resource pack to swap only the visuals. Players might jump into what looks like a refreshing pool of water only to realize it's actually lava—or tentatively touch a "lava fall" to find it's safe water. Puzzle & Interaction Mechanics
: Build a redstone-based Lava/Water Switcher . By using dispensers and pistons, you can create a single "tap" that toggles between pouring water and lava. This is often used in automated farms to either "wash" items or "cook" meat. Lava and water swap!
: Normally, water cools lava into obsidian. In a swapped world, you could make lava "evaporate" water or turn it into a new hazardous block like Pumice or Superheated Glass . : Use a resource pack to swap only the visuals