Scourge of the End (Alex's mobs and caves addon)

Just to reinforce the void worm in Alex's mobs.

The worm is twice the size of a normal worm.
It fires fireballs from each segment. They do not homing, but they cause a large explosion that destroys blocks.
Sometimes they remain stationary and concentrate on a barrage of attacks. This condition is your chance to attack the worm.
Once every 30 seconds, it fires a missile that homing at high speed at the player. The missile will immediately explode as it approaches the player, dealing up to 96 damage. To prevent this, the player must attack the missile with a bow or other weapon to destroy it.
The worm no longer splits up.
Worms will rapidly accelerate when approaching a player at close range, dealing very high melee damage.

Caution, this add-on is clearly not intended to be a challenge in vanilla gear!