This is a very aggressive ability that wants the player to attack as much as possible and to cast spells/activate abilities during combat
If codes are ordered with physical items then the physical code card will be sent to you in the post along with the other items on your order
Consider conceding on lower stages to complete Battle Tasks as they do not guarantee the Promo Packs
Here is a list of the cards I have noticed: Lighthouse Chronologist, Artificer Class, Barbarian Class, Cleric Class, Druid Class, Fighter Class, Monk Class, Paladin Class, Ranger Class, Rogue Class, Sorcerer Class, Warlock Class, Wizard Class Phyrexian Dragon Engine Meld seems to have a similar issue
Lrien Revealed Three cards for five mana is an acceptable rate, if not particularly exciting
Yes, affinity can be used to lower commander tax