Cartoon Network announced last year that Adventure Time will be coming to an end after the ninth and final season airs sometime in 2018, but not before they squeeze another mini series in there.

Airing April 21 on Cartoon Network, Adventure Time: Elements is an eight-part series that will see best friends Jake and Finn return to the Land of Ooo “only to find that there have been some radical changes in their absence.” Elements will be the follow up to Adventure Time: Islands, that aired earlier this year.

Click here to watch the trailer