Doubling Season is the kind of card that will attract a lot of attention
Each player begins with 8,000 life points with an objective to use their cards to reduce their opponent's life points
This can easily accumulate Storm before you connect with your Commander, or you can use this card as your Storm payoff to generate a ton of mana and card advantage
Flamewar is another cheap body at three mana, plus it has a decent ability as a sacrifice outlet for artifacts, but its sorcery speed hurts the power of the card quite a lot
Then you can use this in decks with evasive dorks, combat triggers to give menace to, and Dimir Commanders like Vela the Night-Clad and the flying Dragonlord Silumgar
You can plan for such things in most instances and use the appropriate spell on the appropriate target based on the stage of the game and what you expect to need to kill