So I've mentioned the idea of The Rumbling coming to Equestria before. First a recap of what The Rumbling is. It is a cataclysmic event involving Karl Fritz's Wall Titans marching across the earth, destroying all life upon it. Now if Twilight Sparkle had the abilty to activate The Rumbling what would she do.

Would she.

A. Just activate it, and destory the entire world outside of Equestria no questions asked.

B. Only unleash a few hundred Wall Titans instead of all Ten Million, but instead of having them Destroy anything she has them stand in a formation, and sends out a message to the lands outside of Equestria letting them know that she can do this, and if she's given no other option she will activate The Full Rumbling.

C. Not activate The Rumbling at all and just give up and let Equestria be destroyed.

D. Activate The Full Rumbling, but only as a last resort if she was given no other options.