This extra layer of protection helps protect you if you have your graveyard exiled or have cards exiled over the course of the game, ensuring your next Slime Against Humanity doesnt go back to being a 2/2
When both of these cards are on the battlefield, Urborg, Tomb of Yawgmoths ability gets overwritten by Blood Moon turning it into a Mountain
EVERY DRAW COUNT(ER)S Dusk Legion Duelist is the hot new card draw option for decks that employ +1/+1 counters, and though you can only activate it once a turn, it can also be triggered in an opponents turn, which isnt hard to do
Master Xande Venser, Shaper Savant is a solid utility/value creature that your opponent wont see coming
The game checks through a list of these rules any time a player is about to get priority, and uses state-based actions to move cards around and otherwise ensure those rules are enforced correctly
for a Tarmogoyf, the price is an unwanted consequence, but for a Fable token, the price is the point