Today I'm showing you an easy-to-build obsidian farm. there are two versions, a 1 wide tileable farm that can be duplicated next to each other, and a more simple one that doesn't use any hopper miencarts but is a little bigger. The simple and 1 wide farms produce 3,000 obsidian per hour, or 50 per minute!

Just place down a minecart, connect up lava and power and it will start working.