Thunder Sac

Thunder Sac is a loot item obtained by hunting Frilly in the Desert Biomes. It is a random drop, so getting one depends on repeated kills rather than a guaranteed harvest from any single creature.

Because it comes from a desert predator, the most reliable way to collect Thunder Sac is to search Desert Biomes and focus on Frilly encounters. Since the drop is random, clearing multiple Frillys in one trip improves your chances of obtaining it. If you are specifically farming the item, it is worth planning your route around desert exploration so you can keep moving between spawns instead of waiting for a single target.

• Found from Frilly in Desert Biomes
• Dropped randomly, not every kill
• Best obtained by farming multiple Frillys during desert runs