I noticed that many players started to play Blood Moon in extended affinity maindeck. What's the point? [[Blood Moon]]

The Extended PTQ is coming soon, and I realy want to play a combo deck. I thought about playing Tooth & Nail combo (which i allready played at the past) with a few changes.. [ …

Can anyone suggest a good way to get extra mana for white, blue or black for an extended legal deck?

My brother is going to the world championship in Rome is a couple of weeks, and he hasn't done any testing What are the decks he should consider for Standard (T2) and extended? I …