I like unusual card types. So I was intrigued by Land Creatures. But Dryad Arbor was kind of a mess, both by being confusing and being very powerful. I tried to design simple Land Creatures for every color for this set. It has a theme with Fortifications, so why not put interesting lands in it? I wanted to make it more balanced, they are fetchable, because of their basic land type, but they enter the battlefield tapped. I have no idea if that makes them better or worse.