Ultimate weapons always get the spotlight, but there are a few rare weapons in The First Descendant that might be worth your while as well. One of them is the Vestigial Organ, and here's how to get it in The First Descendant.
How to Get the BEST LAUNCHER "Vestigial Organ" in First Descendant! (Tips & Tricks)
The Vestigial Organ is a launcher in The First Descendant that drops in multiple missions in the White-night Gulch and Agna Desert areas. There are multiple missions and they all have a 50 percent chance of dropping the weapon, so your grind shouldn't take too long.
These are the missions where the Vestigial Organ is found:
The Void Fragment mission in the Hatchery is by far the best mission to farm. It’s fast and you can farm Void Shards at the same time. There’s also a chance to get an Electric Conductor Ultimate Module. The module increases the weapon’s ATK when attacking enemies affected by Electrocution, which can work well in a Bunny build.