While four of these are exclusive to Collector boosters in the vivid Neon Ink foiling treatment (Aang, Zuko, Katara, and Toph for Air, Fire, Water, and Earthbending respectively), five more neon-less ones can also be found in Play boosters
It is a card that combines genuine scarcity, iconic design, the Charizard premium, and a uniqueness of concept that no other card can replicate, and those factors have combined to create one of the most sought-after Charizard cards in the entire hobby
But you can see where they were going with stuff like the Unearth mechanic
2000 $150$200 The hype ramps up further
It was, in fact, used on numerous TCGs, such as Jyhad (later Vampire: The Eternal Struggle ) and Netrunner
Theres a lot of discussion online about the optimal number of turns to pay into Mystic Remoras cumulative upkeep, and the answer really depends on the situation