Fortunately, Thanos' plan as narrator was convoluted and required the unlikely possibility of convincing the forum posters to conspire in letting them die.
Unfortunately, unless the forum posters did everything exactly right to the minutest detail, in every other possibility, they would fail to stop Thanos.
Unfortunately Princess Daphne was allergic to fairy dust and sneezed Sleeth to Oz and Thanos to Wonderland and Sir Kellington into the wookie and Greedo and the narrator tumbling down the cave stairs and slipping on the mouse.
Fortunately the dragons magic had already infused the chocolate nail and it would find it's new master. Once it figured out what a master was. And magic. And all the other things about. It had already figured out it would probably be an epic journey spanning across decades.
Unfortunately, it was quickly found by a hobbit, who promptly became obsessed and took it deep underground, planning to covet such a precious artifact for generations.