Obviously, this is bad news for most of those speculators
Prior to the ban list, the TCG had a Forbidden/Limited list
But once you realize that for four mana you can do upwards of six damage to each player a turn, in addition to having access to cards like Price of Progress, youve got a recipe for success and violence

Madison Li Dynaheir, Invoker Adept Elsha of the Infinite Elsha, Threefold Master Gandalf of the Secret Fire Gavi, Nest Warden Ghost-Spider Gnostro, Voice of the Crags Hinata, Dawn-Crowned Jodah, Archmage Eternal Kasla, the Broken Halo Kate Stewart Kilo, Apogee Mind Kykar, Wind's Fury Leori, Sparktouched Hunter Liberty Prime, Recharged Narset, Enlightened Exile Narset, Enlightened Master Narset, Jeskai Waymaster Nia, Fabled Skyclimber Numot, the Devastator Optimus Prime, Hero Pramikon, Sky Rampart Ruhan of the Fomori Saint Traft and Rem Karolus Satya, Aetherflux Genius Sevinne, the Chronoclasm Shiko and Narset, Unified Shiko, Paragon of the Way Sokka and Suki Sokka, Tenacious Tactician Tetzin, Gnome Champion The Archimandrite The Face of Boe The Golden-Gear Colossus Vadrok, Apex of Thunder Vadrok, Apex of Thunder Zedruu the Greathearted Zinnia, Valley's Voice Zurgo and Ojutai owyn, Shieldmaiden
The Pokemon card market is in a great place right now