This is the end of all existence.
"This is the end of this planet's lifespan."...... I don't quite get how dangerous or how hopeless this situation is, but...That's easier said than done, and I wouldn't just let you try, either.This is nice and simple. We just have to kick this thing's ass, right? It will bring about the world's demise. This demise existed even in the future that moved to a different planet.