What is slightly surprising, though, is that the Special Illustration Rare variation of the Tera Charizard ex card is listed at a higher market value than the golden Hyper Rare version, despite the latter being the rarest card out of the four variations
"There are lots of cards that have doubled or tripled in price in the last few years." Many factors come into play when pricing cards for resale
Somewhat remarkably, its not only the ultra-rare mythic serialized Retro Artifacts that are fetching top dollar
Similarly to Mono-Red Phoenix, the main upgrades are in the mana base
Since its a cast trigger, that spell doesnt have to resolve to get the energy, but that means you cant get it from other artifacts just entering the battlefield
We also saw [casthaven]Darksteel Citadel[/casthaven], a land which can produce multiple mana when a player has cards with affinity for artifacts