Who ever asked this question is stupid.You just walk up to it.
There is a door
Sorry There Is No Such Thing
Portal door
Under the waterfall near rainbow bridge. Look for the door with a skull on it
You know where rainbow bridge is? Go inside the waterfall and there is a door. There is your passage to nightside!
You Turn Around and go through the door with the yellow light in it
Please Be More Specific About Which Tower If You Are Talking About Golem Tower Go Through The Door That Says Exit
No, Wizard101 has no viruses if you install it from Wizard101.com
No. You do not. However you have to get a certain key which is unknown at the moment. But I do know you also have to reach level 12!
To open the second door in Katzenstein's Lab in Wizard101, you need to locate and activate the three hidden switches in the area. These switches are usually found near the walls or behind objects. Once all three switches are activated, the door will unlock, allowing you to progress further into the lab. Make sure to explore the surroundings thoroughly to find them all!
Wizard101 is for windows. But I believe you could get Wizard101 for Mac.
Contact Wizard101 Support at: via email;; support@wizard101.com