Whenever Kroxa enters the battlefield or attacks, each opponent discards a card, then each opponent who didn't discard a nonland card this way loses 3 life
Magic is an incredibly complex game (try to print out the entire comprehensive rules and see how many pages it takes
You Can't Control What You Mill There can be very specific times where taking cards out of your opponent's library crumbles their strategy
It is rather cheap, however, and it is still a saga, which means it synergizes with 1) enchantress effects (Mesa Enchantress) 2) blink effects (Brago, King Eternal) 3) counter manipulation (Hex Parasite) to get more value out of it
You'll get the most recent data all the time, and the best part is that most people are selling their graded cards on the platform
I know, the FFVII Summon: Knights of Round gives 12, so thats what you get, on top of an indestructible 3/3 creature