How To Get Extra Wildcards In MTG Arena

One of the most frustrating aspects of [Magic: The Gathering](http://www.thegamer.com/tag/magic-the-gathering) Arena is how difficult it is to build new decks, thanks to the Wildcard mechanic. This crafting scheme requires you to earn, or sometimes buy, additional Wildcards of the right rarity to make copies of the card you need to finish off your deck.