One of the main rules of MTG is that you can only play one land each turn, so these cards break this one fundamental rule of the game
If you do happen to have a first-edition, holographic base-set Charizard, youre not guaranteed thousands of dollars
While this can be a little dangerous (especially against Phelddagrif decks), you can harness this effect to enable some extra mana for cards like Vampiric Tutor, Entomb, Infernal Grasp, or Village Rites while still tapping all your lands on your turn
When Wizards of the Coast previewed this card, they even mentioned this synergy during the livestream
Let us know in the comments, and we'll see you at the table we're wheeling into the bay to have room to play
After all, its always fun to see a creature type expand and evolve