This story is a sequel to Rot

After the events in 'Rot', Twilight Sparkle has finally come to terms with her new self. Can she control her new powers? Can she ever have anything close to a 'normal' life again? And what happens when Discord's past mistakes come home to pass judgement on the 'new' Princess of Friendship?

Teleportation - the best way to travel! Not many unicorns master this ancient spell, and even among those who do, the details of how exactly it works remain a mystery. Some even fear what it may or may not do to the caster, but nopony knows for sure.

After much studying, it is time for Twilight Sparkle to perform the spell for the first time. A simple test: Just move from Point A to Point B. But Twilight is about to find out that there is more to teleportation than she thought.

A lot more.

Set prior to the show canon.
Inspired by (but completely unrelated to) Ocalhoun's story Blink.