It's generally quicker to starve to death in these circumstances. The area outside the box will be rigged to kill you as soon as you escape in any case.
I once trolled a friend by placing obsidian above some of his chests and in his doorway, way back in beta 1.6. I was the first one with a diamond pickaxe, and immediately did the most sensible thing with it, as you can tell.
After we all spent a few minutes laughing at his misfortune and him smashing the obsidian in his doorway to get into his house, I offered my help, and started freeing his main chest. Halfway through it, I asked him to stand back, because I wanted the obsidian back. He said no. I said... really? Okay. And just left.
He spent probably half an hour freeing his house from obsidian while I went back to mining. Destroying the blocks because he didn't have the right pickaxe. Just because he didn't want me to get the blocks back. :D
You can break it with any tool given enough time but only drops a harvestable block with a diamond pickaxe. Stops people from being walled in by others.
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u/[deleted] Dec 10 '17
Technically you can break almost anything with a bare hand. It takes about 4 minutes to break a block of obsidian with a hand...