So Common cards and Uncommon contain more vanilla cards (with no rules text) or cards with just one keyword, up to 5 or 6 ink cost at max
Thing is, planeswalkers get their loyalty counters when they enter the battlefield as a replacement effect, but transforming does not count as entering the battlefield (that's why Sorin's regular transformation tells you to exile it, and then return it transformed)
It then leverages Izzets dragons, tempo, and control to manipulate the game and pull out a win through combat damage
"ith the advent of play boosters, is the rule of approximately 6 months later still the case?"
After Dave designed the cards, Richard incorporated them into a deck he used to play with Lily
It lets you rummagediscard and drawand deals damage to a creature or planeswalker equal to the mana value of the discarded card, as long as its not a land