Two main factors drive the cost of cards: collector appeal, and demand from competitive players
In my games with it so far, Ive enjoyed mirror versions of Archon of Cruelty, Farhaven Elf, and even Nyxbloom Ancient
DemonDragonJ on Fires of Purgatory 5 years ago I have also replaced Oros, the Avenger with Mathas, Fiend Seeker , which reduced the average converted mana cost of this deck even further from 4.16 to 4.11, because, as much as I wish to have all ten primordial dragons in my EDH decks, Oros simply does not work with the strategy of this deck, but Mathas very much does, so he is a welcome addition to this deck
While it has remained the burn color, its focus on land destruction, chaotic effects, and global destruction has toned down a bit
S S is a rarity for Shiny Pokmon cards