The card won't be overtaking games in this deck and when used properly you won't even notice the impact the card makes
Outside of the very popular Mox Amber from MTG The Brothers War set, here are a few other notable cards that you might want to keep an eye out for: Ragavan, Nimble Pilferer Multiverse Legends from the recently released March of the Machine Set Numbered 1/500 This card, which was serialized #1, sold for an astounding $6,500 just a few weeks ago
Here is a list of the cards I have noticed: Lighthouse Chronologist, Artificer Class, Barbarian Class, Cleric Class, Druid Class, Fighter Class, Monk Class, Paladin Class, Ranger Class, Rogue Class, Sorcerer Class, Warlock Class, Wizard Class Phyrexian Dragon Engine Meld seems to have a similar issue
I wasn't able to buy anything online by myself at the time, but I would look at sites like PokeOrder all the time to see how much this Charizard was being sold for
If you bring a creature to the battlefield during the opponent's turn (for example, Teferi Mage of Zhalfir), and the cunning opponent phase it out, Teferi will phase in at the beginning of your untap step, and you can attack with it during the same turn
I do own Aetherflux Reservoir and it represents a wincon if my life total has gone up enough
