Like most Magic: The Gathering cards, the value of Summon: Good King Mog XII depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Final Fantasy Commander)
Dawn of Hope 7
Sometimes, it's a creature's power and toughness that get misprinted, such as the case with the Anthologies printing of Mirri, Cat Warrior
Like most Magic: The Gathering cards, the value of Rex, Cyber-Hound depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Fallout)
Lillies Clefairy ex SAR and Ionos Bellibolt ex SAR from the same set also command premium prices
Given Miaras death trigger, the deck wants to lean into an aristocrat shell that sacrifices the elf tokens produced by cards like Lys Alana Huntmaster to Deadly Dispute to reap all the grisly rewards a Golgari deck entails