How did the last shadow crystal explode automatically?

When the attack only causes 0 damage, the last shadow crystal automatically explodes. "My World" is a sandbox building game, where players can build or destroy squares with various squares in the three-dimensional world. In the game, the last shadow crystal will explode when this attack only causes 0 damage; Finally, the explosive power of shadow crystal is as big as that of high-pressure crawler, which is 50% bigger than TNT.