Collecting three alien devices, then activating the Countermeasure Device underneath Corny Complex is the last of Week 12’s legendary quests in Fortnite Chapter 2 Season 7. Remember – you only have a week to complete this quest!
This quest set begins with you receiving instructions from one of the payphones located on the Fortnite map, crafting weapons using Alien Nanites, destroying target dummies with IO weapons, searching for books on explosions and deploying scanners in the alien biomes.
Completing this challenge will reward you with 30k XP, which will help you unlock more Battle Stars for the Season 7 battle pass. This will also begin you to the end of this set of legendary quests!