A person stole a obsidian block by police333

In the year 2050. Steve was entering his cave. He had his new, shiny pickaxe made from diamonds. He descended to the pitch darkness with only 10 torches to spare. He was hunting for only 1 thing. 1 block. And that was the Obsidian block. Shiny, bright, blast resistance. It was the only thing a man could ask for. He had located the obsidian and mined it with all his might! But something happened, SOMETHING BIG!!!. The torches faded and a second later.
The block was GONE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!.