This plugin contains a custom enchantment effect to allow you to 1 hit kill a player/mob by shooting at their head (no helmet). If a helmet is worn piercing effect will take place give more damage to the head.
Just install TE-HeadBlowEnchant.jar in TokenEnchant/enchants folder. Then you can either "restart the server" or "reload the plugin (not /te reload)". HeadBlowEnchantment will automatically be loaded into TokenEnchant framework.