Lava Spawner

The infinite lava source was a block that would create infinite lava, which would replicate infinitely to fill up volumes.

Occurrence
Infinite Lava sources were first added to the player's Inventory on January 22, 2010. Later they could be found in chests in the Indev House in a stack of 99 or 100. They were generated as a block in the world.

Usage
When placed, an Infinite Lava Source block creates 4 blocks of Lava at its sides which then spread infinitely like fluids in Minecraft Classic. Breaking the source block stops the spread.