Part of Storyline
When you need to specify movement from an effect on the storyline, the entire movement path goes onto the storyline before any movement actually resolves. Each step is resolved one at a time, but the whole movement path is placed on the storyline first. See Splitting Events on the Storyline for an example of Grapple Shot, and see Projectiles That Cause Forced Movement for more details. Some effects cause movement to a specific location without specifying the path, e.g. Giant Shark. When such an effect resolves from the storyline, you must specify the shortest path that would allow the unit to actually reach the desired destination, ignoring triggered abilities. If there are multiple such paths, the controller of the effect chooses among the tied routes. If there is no valid path that allows the unit to reach its destination (e.g. Iceberg), do not move at all.