This challenge is part of Fortnite Season 4 Week 3 Challenges and you'll have to place fire traps. Similar to the old traps that were once present in the game, fire traps are fairly common items found in chests and on the ground.
There is no need to trap an opponent to overcome the challenge: simply placing the item on a wall is enough. You'll then have to repeat the operation twice to complete the challenge.
The fire trap will inflict 50 damage to anyone who passes by. Be careful, as many people will want to take the challenge, so a large number of traps should be present in your games.
Original content by Maxime "Biaggi" Ricoveri.