mtg march of the machines most expensive cards GAMING: five from the Machine- Aftermath The 10 Most Expensive MTG

That's tied to how much people like these characters and want to run them as their commander or how fun, unique, and powerful they are as cards

Usually in a mulitcolored deck, the costs of many spells is significantly less, but requires more colored mana symbols in order to make the mana base more difficult to achieve

You also receive a set number of wildcards of various rarities, which can be redeemed to purchase specific cards, and you seem to be able to get more by accomplishing some of the games weekly objectives

This means that if you hit two of them off a Collected Company, all your creatures get +4/+4, and thats assuming you didnt already have any on the battlefield