Modern tricky cards. I found a very interesting article about modern cards, written by a judge explaining how the effects are applied.
Forwarder from http://mtg.summoning.ru/ article by Irina Samonova.

 

 

 

 

 

 

 

It is surprising how a card with only four words in the rules text can be so confusing. And it’s all because these four words change types. Let’s take a closer look at it.

We shall start with understanding which lands Blood Moon affects and which stay unaffected.

It’s simple. If you see the word “Basic” in the land’s type line, the land is basic, otherwise the land is nonbasic. Granting a basic land type to a land isn’t related to it being basic or nonbasic. By the way, the name of the land has nothing to do with its supertype* either.

http://mtg.summoning.ru/cards_eng/BloodMoon.shtml