Adventure Quest is free even if you decide to take guardianship and/or the x-boost its still free. You pay if you want to get guardianship and/or the x-boost but its only a one time payment. You can battle monsters whenever you want. Take Quests and higher in rank and get new powers for that unique suit such as the rogue outfit,Mages robe,Vampire slayer,Dracomancer and other ones.

If you become a guardian you get so many advantages like new weapons and armor full access to the game and for free you get to try the new add on dragon fable. The x-boost give you ten thousand gold and 500 Z tokens. Z Tokens is a special currency that allows you to buy special weapons and other cool stuff. You can have one allie to fight with you and a pet. You can also buy pets with Z Tokens. Pets are little creatures that assist you.