While Wizards new distribution method does accomplish this goal, it appears there are side effects
Given the name, it should come as no surprise that these lands were one of the prizes available
The reason why Solitude is much better in Modern than in Legacy, where its largely only played in Recruiter of the Guard decks, is that the presence of Daze/Wasteland and the format being faster means its quite difficult to hardcast Solitude
Survival is an ability word: all creatures with survival behave similarly, but the exact effects of their ability vary
You get the free, unrestricted sacrifice ability while getting to sacrifice a wider range of permanents, accessing a second color, and a cheaper mana cost
Scourge already gets a +1/+1 counter for attacking the player on the throne, but an entire extra combat is a huge bonus