There is a clear order to the construction of this deck, and while thats occasionally hindered by card draw, you can immediately see the logic in your hand, and understand which cards should be played first, to take advantage of any possible counter placement and proliferate mechanics
Also it is worth noting that it was a 9x11 sheet, most later WOTC holos sheets contain 10x11 cards and more modern holos sheets contain 11x11 cards
If it is mixed with the original, it is difficult to distinguish even the person himself, so he attaches a yellow sticky note to mark it
And, of course, you can imagine how evil this is with Kiki-Jiki, Mirror Breaker, or Freed from the Real and any permanent that taps for blue and at least one extra mana