They can still tap for mana, so you aren't forcing them to have a bunch of Mountains out, but this is a nice and friendlier way to attack people who abuse lands precisely because they are harder to answer and people feel uncomfortable playing land-answers
The final core set (soon to be replaced with the 2nd set in the 2nd block of each season) is chock full of subtle and original cards that many players, both pro and amateur alike, have been having trouble evaluating
Normally youd just let it through, but then theyll draw a card, and you cant let that happen
Teval's Judgment - Just read the card name, dragon bro
The Expanse Alongside the new mechanics and special treatments, there were also a wide variety of cards shown off today that could be an exciting addition, whether cracked open in a Limited draft or slotting into a Commander build