Back way when, Wizards didn't really make sure that there were ENOUGH playable limited cards in the common slots for sets (no one was playing much limited before the inception of the Pro Tour, around the release of Ice Age ), so horribly unplayable cards like Snowfall and Balduvian Shaman glutted the common slots of packs - and commons are where most of the meat of your limited cardpool comes from
How to get Special Shop Tickets To get Special Shop Tickets, you can do two things, both of which are available for paid or free-to-play players: Consume rare cards Exchange with Shop Tickets Exchange your rare cards Exchanging rare cards is a simple, but risky way to get hold of Special Shop Tickets, as it will involve you losing that specific card
It also has an activated ability to draw a card and then discard a card, but that isn't the important bit of the card
Seriously, could you find a better card for the price
Take an extra turn after this one for each coin that comes up heads
Overall, commons seem less popular in March of the Machine than other recent sets