This mod a new type of firepower to MCPE called a C4 explosive. It’s a bomb which can be placed down on the ground and then set off to explode in 10 seconds. It’s very useful for terraforming or any time when you want to more easily demolish something, but it’s also just very fun to use!
How to plant a C4 explosive?
The creeper is replaced by a C4 explosive. This means that you need to get a creeper spawn egg to plant a C4. You can place it down anywhere on the ground and then use a flint & steel to ignite it. It takes around 10 seconds for the C4 to explode. Take this time to find somewhere safe to stand and watch.
It’s a really cool and useful way to explode things!