When you find legendary armor or weapons in Fallout 76, you usually customize and maintain them as much as possible. Legendary Cores allow you to turn regular weapons and armor into legendary ones, and even reroll their associated effects.

Here's how to get legendary cores in Fallout 76.

Unlike Fusion Cores, which power your Power Armor, Legendary Cores are a form of currency in Fallout 76 that you use to turn regular gear into Legendary ones. Simply visit a compatible crafting station with a Legendary core and you can turn even a low-level gun into a shiny Legendary weapon.

You can’t choose which legendary effect you get, but you can always use a different Legendary Core to reroll. Originally, there were many different types of Legendary Cores, but this idea was quickly scrapped and now they are all the same. As you can imagine, Legendary Cores are quite rare and can only be obtained through certain activities in Fallout 76.