[D] Mountain Breaker: Discard the top card of your opponent's deck
DP are used for a wide range of things, from buying new cards, improving existing cards and altering deck construction limitations, to more esoteric things like personal traits, mission progression, and of course the Destiny Draw mechanic
After cutting, you have a few options: Sleeving Over a Common Card: Some players place the proxy in front of a random YuGiOh common card, then slip both into a sleeve
Its most appealing in EDH as a member of the 99 in an auras deck, though still unpopular there
Illustrated by Jonas De Ro Standard Not Legal Alchemy Not Legal Pioneer Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp
Not being able to pull the cards seen on the pack is naturally discouraging, but that may change if players manage to get a shiny EX instead of the standard one in other packs