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)
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
All my opinion of course, so let me know how youd rank MTGs card frames in the comments below
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
Next up we have an extremely unique and much sought-after card
In reality, the effectiveness of this strategy is a confluence of many factors, with availability of mana-fixing being one of the least impactful