Somewhere Over the Rainbow

Somewhere Over the Rainbow is an Achievements (PvZ: GW2) that was introduced in the Trials of Gnomus DLC. To earn it, the player must collect 25 rainbow stars from completing matches inside the Mystery Portal.

Origins
Its name is a reference to the song "Over the Rainbow" (often referred to as "Somewhere Over the Rainbow"), which was written for the movie The Wizard of Oz.