Endo in Warframe is used to upgrade the never-ending rotation of mods that you will need if you want to take advantage of the potential power of your Warframes, weapons, and companions. It can be one ...

Warframe has a ton of content viable for farming Endo; however, among all the different modes, the best places to grind the resource are from activities like Zariman Bounties, Arbitrations, and Arena.