Fleeting Expertise: Drop sources, locations, and probabilities

Missions with a Chance to Get Fleeting Expertise as a Reward

Note: In Warframe, Derelict Vault drops refer to special items and rewards that players can find in Orokin Derelict missions (most Deimos missions except the open world). These vaults are hidden rooms that can only be opened with the correct Dragon Key in your inventory. Each key has a different debuff, adding an extra layer of challenge to carrying them. Once the door is opened, players can obtain exclusive mods known as Corrupted Mods (like this one), which offer powerful bonuses to certain abilities, but also come with a drawback, making them a double-edged sword.