This mod features new NPCs that will aid you against monsters.
Mercenary post in the wilds:
The mage can be spawned if you have a medallion and an enemy mage spawner.
They will set your enemys on fire and they have a chanse to strike them with lightning.
The Medallion is an item found inside enemy castles. Right now there only use is to make your defender NPC follow you. (Like animals following wheat)
You start with building a block for the mobs to spawn on. Like this:
Bow = Archer Block
Sword = Knight Block
Note: Player who join the server need to have Castle Defenders installed on the client. The minecraft.jar is located at C:\Users\Username\AppData\Roaming\.minecraft\bin
How to change Block ID and Castle SpawnRate:
For Minecraft 1.5.2
For Minecraft 1.5.1
For Minecraft 1.4.7