When you +1 her she will drain 2 life from a foe, which helps to win the game and you can slap a corruption counter on any dork or fellow planeswalker which she'll protect from
So when you actually cast Emrakul it is absolutely the best at winning the game as it comes with a free Time Walk
While it doesnt technically double up your ETB triggers, Reflections of Littjara can copy any of your scarecrows
What makes this more exciting than, say, Desertion, is that you arent limited to the type of spell you counter
The rest of the ramp comes in the form of Auras that enchant lands and make them tap for additional mana
At their worst, these sets are like The Walking Dead Secret Lair, where you have new cards in weird skins that will apparently be released in the future, but with no time frame whatsoever to speak of