Legendary Core

Legendary Cores are a form of currency and miscellaneous items

Gameplay
Resembling a fusion core, Legendary cores are used to add Legendary effects onto non-Legendary weapons, armor, and power armor at the appropriate crafting workbench. Additionally, they may be used to reroll the pre-existing effects of a Legendary item. This will remove any existing effects.

Locations
Legendary Cores can be obtained by completing public events, seasonal events or Daily Ops. Additionally, they may be redeemed as scoreboard rewards. Double Mutation Weekend events for Daily Ops will award double the Legendary cores, and will continue to reward them on subsequent completions.

Bugs
Legendary Cores appear in the MISC tab of the Pip-Boy rather than in the CURRENCY section.

Behind the scenes

 * Legendary Cores were initially introduced as three items - 1-star, 2-star and 3-star cores. Due to oversights and the overall complexity, this was replaced in favor of a single currency system early in the Steel Reign PTS cycle.
 * As a result, there are unused files for 2-star, 3-star and 4-star cores - each adding an additional star and progressively becoming more polished.