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EXO Planet #4 – The Elyxion (stylized as EXO PLANET #4 – The EℓyXiOn) was the fourth tour of the South Korean-Chinese boy band EXO. The tour was officially announced on October 19, 2017, and began in Seoul's Gocheok Sky Dome on November 24, 2017. EXO announced the encore of this tour in two cities: Seoul, South Korea from July 13 to 15 and Macau on August 10 and 11.