Your LGS might also re-sell codes, but the fact that theyre usually included with products that are up for purchase makes this a little less likely
The only reason its this far down on the list is because the rest of the cards were looking at are also pretty cool
Falling under the Amethyst ink type, this card has a very high cost of 8 ink to be summoned, however, if a player has an Elsa card already in play, the Spirit of Winter card can be "Shifted" and summoned for only 6 ink
Since we wanted you to be able to play with every card you opened in Limited, they were a non-starter
Here is a very general overview: White (Plains): Focuses on order, protection, justice (like exiling opposing creatures) Blue (Island): Specializes in control, card draw, and manipulating the game (like countering spells)
In reality, the effectiveness of this strategy is a confluence of many factors, with availability of mana-fixing being one of the least impactful