While farming enough obsidian to finish my hellfire set I discovered a pretty neat trick to never be forced to return to hell for more lava. What you need for this guide to work: A bucket of lava A fairly large lake (that eventually will be drained) Patience Step 1 Find a fairly large lake or mass of water and start digging a tunnel straight down beside it. Step 2 Dig a tunnel towards the lake as close as possible without letting the water in. Step 3 Dig a tunnel two blocks below your feet. This is the tunnel were the water flows towards the lava, you need to make this exactly 14 squares long and at the end opposite of the water you need to dig one square down. Step 4 Place two blocks on each side of your tunnel below you and open it up forming a two square wide hole. Step 5 Pour your bucket of lava down in our newly made hole and break the walls blocking it, this will make the lava cover our tunnel and fill up the little hole we made at the end of it. Collect the lava from the small hole at the end of our tunnel. Step 6 Break the wall that is holding the water off and start collecting obsidian. Step 7 Repeat step 3 to 6 and collect infinite amounts of obsidian from a single bucket of lava. This will eventually drain the lake if it's not big enough! So I suggest you use a lake far from your beautiful home if you dont want a big hole in the ground. This works as of patch 1.0.1. Misc If this helps you at all just post a thank you in the thread If you have a better method please post it in and ill edit this post and give you all the credit. Now, Shut Up and Dig!