In order to accomplish the Meteoric Rise mission from the Season 10 of Fortnite, you have to touch a glowing cube, enter the Rift above Loot Lake, and search a landing pod within a meteor. Here is the precise location of the cube, as well as a dedicated guide on how to find the rift and the pod. Check it out!
The Big Glowing Cube
It shouldn't be too hard to find the big glowing cube since it's located just beneath the floating island that's moving across the map. You just have to touch it while landing to accomplish this step of the mission. Also, if you didn't manage to land on the island itself, you'll still have the possibility to touch the cube by jumping into a tornado located under the island.
The Loot Lake Rift
The Rift isn't new content, at all. You just have to land near Loot Lake, and you can't miss it. You will complete the mission as soon as you land on the Rift.
The Pod
Do not waste your time looking at the top of the meteor since you'll find nothing. You'll need to go inside the meteor thanks to the little caves and cavities that are covering it. The Pod should be located in one of them.