Are you looking for Evil Island, which is also known as Wizard's Island?'
Wizard's Island is an island in the middle of a lake near Connor's Village in Daventry. The home of the Wizard could be found high upon its cliffs. A bell on the its shore could be used to call the Lady of the Lake to the surface of the lake. Also Connor have founded his first invisible potion. In that home, there is a globe that is blue, that is a celestial globe and that globe contains clarity potion. Celestial globe only opens with wizards magical parchment.