The Master Ball holo pattern on an Umbreon is simply iconic, and it's one of the most recognizable pulls you can get from Prismatic Evolutions
This can help you sustain your hand somewhat, but this deck suffers greatly in top deck mode
A lot of that is the fact that it's a symmetrical effect, and really only playable in mono-black, but I would argue that a much larger reason for this lack of play is simply that people are unaware of this dollar common from way way back in Urza's Destiny that has never seen a reprint despite not being on the Reserved List
Rarely, one of these sheets of cards makes its way to the cutting area and is released into packs
Depending on whether someones purpose is to buy cards, speculate on certain card values, or build a deck, the answer to the question Which card game is worth the most money
Landfalls a top-tier mechanic