playing temples, gates, and gain lands over fetches, shock, and duals is a great start, but what about all the fancy lands
Ancestral Anger frequently pops up in aggressive decks that want to target creatures with spells, such as Heroic decks in Pauper and Pioneer
Its really good at generating card advantage and messing with your opponents plans, so you get to stay in control while setting up your big moves
The Enchanted slot gets filled by players who've already invested heavily in the format and want a full foil deck for the table presence at tournaments
Finally, Avalanche Riders is a fine sideboard card against greedy decks, but I almost never start it
When people ask me where to start in Commander , I always point them toward the best MTG Commander precons