Mob Bosses is a plugin which adds new boss fights for each boss in the game. This is still in development, and currently has only two bosses, but will add new ones very soon. Stay tuned!
In the config, there is a number for each boss. The higher the number, the less of chance to spawn. A setting of 1000 is a 1 in a 1000 chance to spawn. Change the number to 0 to disable.
Each boss, by default
Difficulty: Medium
The Zombie boss is a takes may hits to kill, and has a very strong melee attack. It has Fire Resistance, Strength IV, Resistance IV, and Speed I. Every 30 seconds, the Zombie fires a fireball at it's target, and a one in ten chance of throwing you up in the air. On death, the Zombie drops a Sharpness VI, Bane of Arthropods VI, Smite VI, Fire Aspect, Unbreaking X Diamond Sword.
Difficulty: Medium
The Skeleton boss takes many hits to kill, but has no melee attack. The skeleton has Fire Resistance, and Resistance III. It has There is a 50% chance of the Skeleton shooting an explosive arrow. On death, the Skeleton drops a Power VI, Flame II, Punch VI, Unbreaking X, Infinity bow.