The Protecto is a block added by SecurityCraft. It will target and attack players and hostile mobs that are within ten blocks of the Protecto every ten seconds with lightning. This will only occur if the Protecto has a direct vertical line of sight with the sky. It must be raining for the Protecto to be able to charge its lightning attack.
The Protecto can accept a Whitelist Module which will prevent the block from targeting any player listed in the Module.