When I was messing around with fire charges and dispensers, I flicked a lever and I saw a purple fireball come out and I saw the particles of the ender dragon fireball. I went into gamemode 0 and the particles afflicted damage on me.
1. Take a dispenser, and put a fire charge in it.
2. Place down a power source.
3.Watch an ender dragon fireball pop out of the dispenser.