When you enter the Isle of the Nameless or your Guild Hall it will be a Sandbox Area. And by that I mean you are free to use skills and do things you wouldn't normally be able to do. This would involve changing the Hero Screen temporarily while in the area to the following:
Attributes
- Attributes can be changed freely and can be leveled up to their most maximum possible, for instance blood could be at 19 since you could use Awaken the Blood and +1 20%, although attribute enhancing things have no effect here.
- You can change your skill bar freely
- You can change your Secondary Profession
- You can change your armor level
- You can change to an option where your mana and health are infinite
- You can change your walking speed
- You can make a limited amount of friendly and unfriendly NPCs with skills and items you've unlocked to practice against.
Since this is just for the sake of testing builds and ideas and fun, I don't really see any downfalls. I think it's alright to let people see what something can be at it's best possible circumstance instead of trying to cast something with a long recharge with Glyph of Elemental Power and not getting the +1 (20%) or something. Also, who wouldn't want to enter their guild hall and start using skills and what not while the guild leader sets up the fight to see what they can get off?