Infinite Lava Source

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

Obtaining
Infinite lava sources were initally added to the player's inventory. At this point they were called "volcano blocks". Originally they were provided in a stack of 5, however they could be later found inside Indev House chests in a stack of 99 or 100.

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. Infinite Lava Source drops itself when broken. and unlike normal lava, it gets soaked up by sponges, leaves no light, and makes gears with contact of water or infinite water sources.

Data values
Their data value corresponds to Oak Stairs in later versions of Minecraft.