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 .

could flow slowly (4 blocks), cause "drowning" damage immediately upon touch (mimicking burning), and set nearby wooden structures on fire. Lava and water swap!

: Reverse the physical behavior of the fluids: : Normally, water cools lava into obsidian