mod works entirely server side using polymer with no resource pack required

the fireball can be crafted with 4 wind charges and 1 fire charge!

there's also a configuration file in config/fireball.json and the default config is:

{
  "fireballCooldownTicks": 5,
  "fireballDivergence": 0.0,
  "fireballSpeed": 2.0,
  "fireballExplosionPower": 2
}