Energy Activators are Enhancement Materials in The First Descendant. They are used to increase the Module Capacity of Weapons by 30 and Descendants by 20. The Blueprints are acquired by opening Amorphous Materials. They drop at a 3% chance from a Normal Mode Amorphous Material and 6% chance from a Hard Mode Amorphous Material.
Note: Not every Amorphous Material Pattern has a chance of dropping Energy Activators. Be sure to check drops info in game of any specific Amorphous Materials.