This challenge is part of the Mandalorian XP Quests. You'll have to go where the earth meets the sky to find a Beskar steel plate. This is a rather poetic way of simply referring to the highest point of Apollo Island.
It's of course the famous Mount Kay, the snowy mountain south of Catty Corner, which has always been the highest place in Fortnite Chapter 2 Season 5.
Where is Mount Kay?
Mont Kay is only a landmark and doesn't appear by name on your mini-map. It's quite easy to spot it from the battle bus, since it's the highest mountain in the game. All you have to do is land on the top.
The place is marked by an orange flag planted in the snow. At the foot of the flag is a weapon box, and right next to it you'll find Beskar steel.
The Beskar steel glows with a bluish light. Simply interact with the item and the quest is immediately completed. Nothing complicated in itself, but as is often the case with other players, you may have a problem.
During Season 5, many players will want to complete their Beskar quest, just like you do. Try to get a weapon to defend yourself as quickly as possible.
Original content by Romain "Zorg" Becquelin.