Instructions
Select "Explore New Games" from the "Games" tab on your Xbox 360's main menu.
Select "Add-Ons."
Select "C" under the "Titles A - Z" tab.
Select "Castle Crashers."
Select "Extras."
Select "King Pack."
Select "Download Now." As of April 2011, the King Pack costs 160 Microsoft Points to purchase.
Launch "Castle Crashers" when your download has completed.
Select any character and select the weapon frog on your map. The weapon frog holds all of the weapons you have unlocked. Press "A" next to the King's Scepter, at the back of the weapon frog, to equip it. Your character must be level 20 to use the scepter.