Lash

The Lash Psynergy is a Utility Psynergy introduced in Golden Sun: The Lost Age. It is added to the Psynergy inventory of an Adept whenever that Adept is equipped with the Lash Pebble, which is found as the quest reward at the end of the Kandorean Temple dungeon. Lash is used (and only used) on coiled-up ropes on the ground, where it will automatically tie it up to the nearest tieable pole; the stretched-out rope can then either be walked on like a tightrope or climbed across. It is required to complete the game.