Authentication and protection are the primary reasons collectors send cards to PSA , BGS, CGC or SGC
Let's say that you follow my advice, mulligan, and look at: Forest, Forest, Forest, Nykthos, Shrine to Nyx, Elvish Mystic, Sylvan Caryatid This six-card hand has no heavy-hitter cards
But whenever it enters or attacks, it exiles a random permanent from your graveyard and creates a token copy, repeating if it's a land
As noted, surveil cards cost about a mana more than their non-surveil counterparts
And thats pretty impressive given Umbreon has risen through the ranks in recent years to become arguably the most bankable Pokemon outside of Charizard itself
Main card page: "Dark Hole" Dark Hole Japanese Rmaji Burakku Hru Translated Black Hole #335: Yami #337: Raigeki Yu-Gi-Oh