The Unknown Block

One day I was playing Minecraft with my friends one of them wanted 8 bedrock and 1 command block I gave him then he crafted a crafting table in the crafting table he crafted A block named the Unknown Block. At night at 3:00 am some notifications sound came from my PC and I saw 1 billion notifications from Minecraft. I opened Minecraft and saw that world which my friend made a Unknown Block for me then it automatically opened and it was telling to place the Unknown Block in the chat I didn't know who was telling that but i placed the block and... To be continued