Outside of removal, there's other powerful spells like the game-ender Exsanguinate, and the value engine Lingering Souls, both of which work well with Y'shtola's abilities due to being greater than mana value 3 when cast
Inkmoth Nexus is the only one close to capable of dealing lethal, and thats for loose definitions of close. Aside from Emrakul, your routes to victory are stealing their end-game with Treachery or Vedalken Shackles or a classic control win via overwhelming card advantage
That guaranteed special land from the Stellar Sight bonus sheet, a chance at special guests and borderless shock lands bring a fan-favorite set to a sleeve near you
The One Ring provides a turn cycle of respite from most threats with trailing card draw balanced against life loss you can easily stomach given all of your food tokens
Here are my picks for the very best Magic the Gathering cards featuring the flower girl herself
The longer a game goes the more lands you are likely to have out therefore an increased chance of having the right basic to have your check land be optimal