That's for later on. After you finish the Maxos Temple completely, you must first do Sentinel Island! On that Island stays the Battle Tower, but you must first do some quests before you can reach that Tower! Success!
On 7th of february 2015 : I start a new adventure in the Divinity world of Original Sin, it's a Fantastic Freaking Fabulous Funny ... it's my All Time Favorite One !
