Fortnite appears to be gearing up for its next in-game event, and it may not surprise longtime fans to know that this one is again focused on Loot Lake. In addition to a large metal hatch in the lake bed, there now exists a floating, alien-seeming platform containing a glowing rune, matching the runes that have appeared around the lake.
Every 100 million damage done to the rune south of Fatal Fields moves it forward. The damage to it is synced across all servers, so it is a player effort to move it.
— Fortnite News – fnbr.news (@FortniteBR) April 19, 2019