Disguise yourself and hit three resonant crystals with the Arrow in FortniteFor this very last step, it is a two-part challenge. The first will ask you to find and put on a disguise. Be aware that it is more or less on site, since it is available at the gates of La Flèche, south side (see map below).
Once put on, you will have to hit three resonant crystals which, although they are a bit far apart, are easily recognizable by their bright pink color. To hit them, all you have to do is give it one hit with your gathering tool. Once all three are hit, you will have completed the challenge and completed all of Tarana's quests.
Note that more than three crystals seem to be available (we found five) and that several places can be used to dress up (at least two). You can find the location of the disguise and the crystals on the map below. To avoid being bothered by potential opponents, you do not have to land directly in the area, but can go there later in the game.
You can find all Tarana and Rax quests here.