Legion Warboss Cant run a goblins deck without Legion Warboss
Perhaps its the popularity of Roronoa Zoro himself, however, but this cards current value of $1,095 on average definitely makes it a great investment, especially as no more copies can be found in the wild
Being able to dig up to four cards deep with Diresight allows you to put what you find into your hand/graveyard right now, no waiting around
Galarian Articuno, the lightning-fast strikes of Galarian Zapdos
I personally play this in my Gev, Scaled Scorch deck, a Rakdos Commander deck focused on placing +1 Counters on my creatures
It could be argued that the cards which have surfaced from the 2009 contest were extra copies that made their way out of the printing room and onto various auction sites (that has apparently happened recently in the case of the Art Academy Primal Kyogre EX card, where the winner still has all 100 of their cards yet extra copies have been sent in to PSA)