I present two contraptions, a double feature! The bazookas and shields are two distinctive contraptions that may bring enjoyment to the holder. Bazookas, with the ability to shoot explosive arrows, and shields, with the ability to protect you in the most strategic way possible!
As I watched video after video, searching for a proper explosive arrows concept, I could not honestly find one that works like this. Unlike many other designs of explosive arrows, this one will also explode if you manage to hit a mob, or player, as well. The other ones only worked if the arrow struck the ground. Remember, this was for the videos I observed. A similar contraption may exist somewhere out there in the deep corners of the internet.
I went a little more indepth with the shields, I did not want to present a simple item that gives you Resistance when you hold it. That is why I went with a process that bases your protection on your timing skills. To test this, we had a little PvP game, in which we used the shields and bazookas. No armor was involved, so we had to use the shields as our main source of protection. It turns out, it is plenty of fun!
Even though the bazooka may use wither skull entities, this contraption is still compatible with the Wither Boss. The contraption is also fully customizable with the explosion power. If you wish to change how powerful the explosion is, there is a green arrow pointing to the command block that spawns the explosion. Change the '3' at the end to however powerful you'd like the explosion to be.
There currently is a bug where explosion particles are not visible, hopefully it'll be fixed soon.