Typically this is the kind of thing I keep in the board for reanimate decks or some other archetype that can produce something before affinity kills it that four damage can't handle
You can also pay two mana to regenerate your creatures and save them from death
Finally, youve got a mix of creatures and every other type of spell
Following the same principle, you can adjust your land count based on the number of cost-effective mana-producing creatures in your deck like Llanowar Elves, or cards that help you retrieve lands like Many Partings, which essentially functions as having an extra land in hand
The fact that many of the cards within, such as Summons, are so well designed only adds to the sets appeal and overall success
And then the Evacuation is a powerful instant that only bounces dorks, but does so at instant speed, which is pretty good for the masses