This addon takes the lucky block to the next level. You'll most likely have mixed emotions when finding one of these. Most of the times when you break one something horrible happens. This could involve everything from explosions to monsters spawning. But there are exceptions because sometimes, on very rare occasions, something incredible happens.
How does it work?
The pig is replaced by a hardcore lucky block. It's not really a block but it does look like one. You can find them spawning naturally in the world or spawn one using a pig spawn egg.
You never really know what to expect once you come across one of these blocks. But for the most part something bad happens such as evil mobs spawning.
But there's catch! Sometimes (on very rare occasions) something good happens. For example, in this case a bunch of diamond items spawned in front of me.
But then again something much terrible can happen such as a lingering potion effect. I recommend you to always keep some weapon on you when destroying one of these blocks.