When you’re looking at new cards, the immediate impulse is often “Holy crap that would be amazing in my Standard/Modern/Legacy/EDH/Cube list, it works so great with this and that!” I’m sympathetic to this, since I have nine EDH decks, and that means every new card has a potential home.
However, Magic is a game of rules. EDH has a hard rule about 99 cards in the main deck, and only the bravest of souls play Constructed formats with more than 60 cards. For every new card that gets added to a deck, something has to come out. There lies the problem.
I have a very bad habit: I trade for cards that I think will be good in a deck before I think about what has to come out of that deck. This process of “making room” has several complications.
Quantity Conundrum
In Commander or Cube, seems easy on the surface. You need one. Unless…you need several. Command Tower and its new cousin, Opal Palace, are something that can really go into any Commander deck. Very few people can say they have only one EDH deck; we tend to have multiples. There are certainly exceptions to ‘staples,’ but you need to have a reason not to play something as universally good as Solemn Simulacrum in every single deck.
Alternatively in Constructed formats, you’re almost always forced to trade for a playset because it’s better to have that option. You want to be able to slot in the full four if needed. And even if a deck doesn’t play four copies of a specific card this weekend, it very well may next.
The Agony of Choice
In competitive decks, adding a card is often a matter of playing the “which is better?” game, with the loser being removed from your deck. There’s a certain amount of figuring out what to add or subtract for synergy as well. Depending on your deck, you’ll find out in the course of playing if a card needs to stay or go.
In the casual formats, a lot of people like to make changes merely for the sake of making changes. That is valid and can be a lot of fun, but you wind up making changes constantly. One thing that I do, and I know others do, is keep a separate box/binder for cards that are no longer in decks, because I might go back to that card down the road.
Metagaming
This is something I’m terrible at, and I refer you to others more experienced. Suffice to say that if there is some hot new card you want to be the guy running it the first week, but by the time everyone adapts to it, you may need to be off it in order to stay ahead of the curve.
Strategic Planning
I have a small binder full of cards that I traded for to put into EDH decks but never found their way there. I just wasn’t able to find something to take out in favor of the new cards!
Such wasted effort in a trade is something I want to avoid. I’ve learned that in Commander at least, it’s possible to plan ahead. Before I trade too hard for a new card, I sit down and look at the deck I want to put that card into. I have to decide what I would take out in favor of that new card – and if I can’t make that decision, then I’m not trading for that card.
Case in point: Primeval Bounty. In light of examining why the price of this card never fell as far as I thought it should, I decided not to trade for all three copies I planned on needing initially. I settled for one that I tried in three different decks, and came away unimpressed.
So when the next big thing hits (we aren’t that far from Born of the Gods spoilers,) be realistic about what you can use. You’ll save yourself some time and effort if you do.