Wizard Towers can be purchased from the Shop. Once you have purchased a Wizard Tower, you must charge it. Select the Wizard Tower, and then drag Magic to the tower (V). You can charge it once for each Wizard or Archwizard living in the tower.
To purchase more Wizards, select the plus symbol. You may have up to three Wizards per tower (W).
Once you have charged the tower, the Wizards will use their magic to conjure mushrooms and flowers. Select the mushroom or flower, and then drag the magic wand to it to make it disappear (X). You will also be rewarded with experience points.