Being the noob that I am, I placed water next to my lava and is now Obsidian. Is there anyway I can get another lava bucket? I have a bucket you can have in exchange. The IRL I am on is skyblock.net and my username is SpanglyFlob178. I really need this lava bucket! Thanks.
As lucario said, you can just right click your obsidian with a bucket, or move the water away and right click the obsidian with your hand. Trading a bucket of any kind is illegal, and will result in a ban.
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