Okay, so let me get this straight. Portal, in order to make itself more accessible to new players, added a bunch of reminder text to pre-existing cards (Armageddon), neutered cards by saying exactly when to use their fast effects (Goblin Firestarter), changed "block" to "intercept" (but then changed it back mid-block), added swords and shields to differentiate power and toughness (actually very thoughtful of them)...

...and then they DIDN'T say what a mountain does?