Imperil decreases the target's elemental weakness one class: Absorbed → Immune → Resistant → Halved → Normal → Weakness. Party members will take double damage from elemental attacks.
Imperil is curable by the item Wax and the magic spell Esuna, as well as the techniques Summon and Dispelga. It can be resisted against with the accessories Pearl Necklace, Gemstone Necklace, Ribbon and Super Ribbon.
Imperil has the same effects as before, aside from the removal of the Water and Earth elements. The icon used to represent Imperil is different, with the water droplet in the icon replaced with a gust of wind, and the red down arrow moved to the center.
Imperil can be cured by Wax and Esuna, as well as the Unicorn Horn item and the Esunada spell. It can be resisted with the Pearl Necklace and its Delicate and Durable varieties, and both the Ribbon and Delicate Ribbon.
Imperil decreases elemental resistances by 50%. It is effective even on enemies that already have elemental weaknesses.
In Final Fantasy Record Keeper, some Soul Breaks can reduce a target's resistance to an type of elemental damage. While there is no official term for this mechanic, "Imperil [Element]" has caught on in the player community.