Technically, Wizards is the most valuable deck in the bunch, aided by some really strong reprints like Nin, the Pain Artist, Marchesa, the Black Rose, and Havengul Lich, all of which are worth more than $5 at the moment
Then tap Account Preferences: Log in with the same account information you use for Arena and scroll down to enter your code and redeem it
A skilled Blue/Yellow pilot controls when and how opponent aggression lands, making every attack on their Life cards cost the attacker as much as possible
A dusting system would also essentially fix the frequent mismatch that occurs between the wildcards you have and the ones you actually need
It helps you smooth out your mana and when it dies, you draw a card
For example, if your Commander is Gandalf the White or Oswald Fiddlebender (both are Universes Beyond Commanders, by the by), you should be using Portable Hole