Often regarded for powerful strategies ranging from control to mill, Dimir (blue/black) is one of the most iconic color identities in Magic: The Gathering
I ended up getting a 42 one of these for my office and it stores my MTG collection plus my record collection pretty nicely
But it gets even better with its [V] ability, Ultimate End, which gives all your other creatures +2/+2 until end of turn and puts an indestructible counter on each of them
Then your landfall here will toss a +1/+1 counter on a dork you control, ideally Obuun to pump your Elemental making
Treasures are useful because they can accelerate your mana in a pinch, or you can use Magdas payoff effect to find expensive artifacts or Dragons to close the game with, opening up a cool token play pattern that is a breath of fresh air after years of Krenko and Purphoros, God of the Forge combo killing tables by generating a zillion goblins
The longer you've been playing the easier it gets, but when Time Spiral released it managed to pack more mechanics into the set than all previous sets combined