A ghast bow is now in your world!
The ghast bow relies on a /testfor command to work.
There are targets (with resets) installed, and a chest with the bow in (with reset).
Screenshots:
The redstones behind:
demonstration:
When using:
you should not change anything inside the obsidian box, and the bow's name.
You must put your bow in the first slot of your hotbar.
But there is a bug within it:
In multiplayer when one player holds the party bow in his/her first slot every arrow including arrows shot by other players,dispensers and skeletons become fireball. I still can't find a way to fix it.
both schematic and the world is up for download!
feel free to install it into your world or for other uses, but you must credit me and provide a suitable link to this page.
Thats all,Enjoy it!