Travel Elsa is a Premium Box Tsum. She is a Limited Event Tsum and is not available from purchasing Premium Boxes outside of the event. She was first introduced during the Japan event Memories of the Four Seasons (December 2019) and on the International Event Memories of the Seasons (December 2020). On the Japanese version only, she is also a musical Tsum and will play the song, "Into the Unknown" during gameplay. She is known as Adventure Elsa on the Japanese version.
Travel Elsa will clear the Tsums surrounding the crystals when you tap the screen. The base radius is SS.
You can swipe the screen to move the crystals around and position different crystals on screen, before you tap. Time will pause while the skill is active, but after a short while the crystals will automatically clear.