I had a 5/2 opening in a game with Summon, Horse Trader, and Berserker. So, turn 1, bought Summon to gain Horse Trader. Turn 2, play that Horse Trader, discarding two Estates, leaving me with $5, which I used to buy a Berserker, and since I had Horse Trader in play, that meant I got to play Berserker on Turn 2. Not often you get to play Berserker in the opening!