The ones that may appear in a normal game of Magic are artifact, battle, creature, enchantment, instant, land, planeswalker, sorcery, and tribal (a card type found on some older cards)
Its just a fantastic multiplayer design
Again, its not as broken as Tolarian Academy (how could it be?), but being able to produce white mana based on the number of enchantments you control can still lead to some truly bonkers turns, especially for Enchantress players
Kraven the Hunter Capitalize on the power to mana cost ratio and you stand a good chance of staying on par with other competitors at the table
Speculators, collectors, and players alike are leaning into the market throwing plastic down on high-end cards, lots, and boxes