The achievement Fulgura Frango belongs to the category of combat achievements in the "Challenger: Series VIII" section. Obtaining it is closely related to a showdown with the world boss, the Millennial Pearl Seahorse, which resides in the dungeons of Fontaine. Here's how you can learn about it in this guide.

How to Unlock the Hidden Achievement "Fulgura Frango"

Primarily, our Seahorse has a certain purple gauge, the Xenomare Pearl, which goes into stasis when destroyed. Just like in a regular battle, focus on it when aiming for the achievement. Before and during the weakened state, keep an eye on the Seahorse's HP indicator - it should remain exactly as much as you can remove in a few hits.

When the creature starts to regenerate the Pearl - glowing purple more intensively - deliver the finishing blow. Now, you've earned your well-deserved 5 Primogems.