Bukkit

2.2:
This build has known bugs and is incompatible with Bukkit 1.6.1 or higher
Added Features

• Added the option to use the custom name feature in minecraft 1.5. This includes the ability to use health/maxhealth and a healthbar in the name. For more info on how to configure this, go here. Here's what it looks like by default.
• Added the OnDeath activation condition for some abilities, if an ability doesn't support it and someones specifies it, Corruption will notify the console.
• Added the Command ability, now you can make a Corrupted issue a command. Use {PLAYER} in the command to use targeted commands.
• Added biome restrictions support. You can now specifiy the biomes a boss can spawn in. This feauture is disabled by default, but can be enabled by setting 'EnableBiomes' to true in config.yml
• Added a /cor version command to check the current version of the plugin (cor.version is needed to use it)
• Improved the API, for more info, visit: http:erackron.github.io/Corruption/

Fixes

• Fixed a bug where Corruption would lose track of bosses in unloaded chunks
• Fixed a bug that would allow bosses of the same type not to spawn when the previous option wasn't supposed to spawn
• Fixed a bug in the Snare ability

Improvements

• Using /cor reload now updates all existing bosses with the new data and removes bosses that no longer exist in the config. (e.g. after renaming them)
• The help command now only shows the commands for which you have the required permission.

2.1.2:
Added Features

• Added the ReloadAfterUpdating node to the global config (config.yml) file.

Fixes

• Fixed Armor Pierce console error (fixes this problem)

2.1.1:
Added Features

• Heroes support (please provide feedback in the form of a ticket)

Fixes

• Armor Pierce fixed (fixes this problem)

Improvements

• The /cor stats <player> command now uses the formatted boss names instead of the internal ones.

2.1:
Added Features

• Added a Snare ability, which surrounds the player with cobweb. The cobweb can be made indestructible in the ability configuration.
• Added a 'Return to sender' immunity for ghasts.
• Made the activation conditions for abilities configurable

Fixes

• Fixed some bugs
• Vastly improved the speed and efficiency of the stats command. (Thanks bm01 for letting us use your solution)
• The armour of a boss is now finally working. Up till now, the damage a boss' armour absorbed was not taken into account, so bosses with armour will now be significantly harder to kill.
• Updated to use the latest mcMMO API. If an incompatible mcMMO version (everything prior to: 1.4.00-beta3-b1612) is enabled, the extra mcMMO exp will be disabled.

Improvements

• Changed the plugin name to Corruption
• Improved the autoupdater, it should be (a bit) faster now.

2.0:
To avoid errors with the setMaxHealth, you have to have at least CB 1.4.6-R0.3

• Add support for Baby Zombies, (Baby) Villager Zombies and Wither Skeletons.
• Use the setMaxHealth() method and update actual LivingEntity health
• Add support for boss health regeneration
• Automatic updater (using dev.bukkit.org), use /lab update install to install the latest version, if necessary
• Added option (in config.yml) to disable update checking on startup, you can still check for updates using /lab update check
• Configure immunities per boss
• Configure which MagicSpells spells affect bosses
• Automatic config updater
• Fixed occasional NullpointerException in bomb ability, the Bomb ability now tries to find a valid block close to the player. (thanks to bm01)
• Multiple bosses of the same EntityType can now spawn in a world
• Added per boss immunities
• Added the option to use the boss stats as absolute values instead of multipliers
• Added an ability assignation chance (thanks to bm01)
• Added a radius for ability executing
• Added possibility to grant extra mcMMO xp for hitting bosses
• Added proper Wither support
• Added teleport ability (thanks to bm01)
• Added option to make PigZombie bosses angry
• Added function to set absolute health for bosses
• Added option to check the size of Slime/MagmaCube bosses
• Removed deprecated API, as already advised in the last version, use the new one that is already present in v1.7.0.

1.7.0:
To use the custom armour, you have to have at least CB 1.4.5-R1.0

• Enable/disable MagicSpells spells on bosses
• (Configurable) armour support for bosses including enchantments (screenshot)
• Added LightningAura ability. A boss strikes everyone within a certain radius with lightning
• Fixed ignore command

1.6.6:

• Added API

1.6.5:

• Added {BOSSNAME} option to messages in the config to get the bossname properly. (BossName#1 would be displayed as 'Boss Name' to a user)
• Added 'Bomb' ability
• Changed 'Slow' ability into a generic 'Potion' ability which can even target the boss itself
• Added customisable message if a boss uses an ability (configurable for each ability)
• Readded the max spawn level/height option
• Added a cooldown for all abilities
• Made the Lab Viewer message customisable
• Made the message if a boss has a negative health customisable
• Changed the probability option from the chance a mob gets an ability to the chance a boss successfully uses an ability. (Will be readded but probably with a different name)
• Changed deprecated spawnCreature method to spawnEntity
• Fixed Utility.isNear method (which checks if two locations are near each other) to support multiple worlds
• Tiny slimes that split from a medium slime won't become a boss.

1.6.0 (By bm01):

• Added abilities
• Rewrote the boss managing system
• Rewrote config processing