In this guide, you will learn where to get Decisive Judgment in Warframe.
Decisive judgment can drop as a reward for completing a certain Rathuum node/arena. Though, the drop rate for the mod isn’t very high in the Rathuum arena reward pool.
Rathuum arena missions are found on Sedna, and the mission/node you have to do is Nakki, as the other arena’s don’t have the decisive judgment in the reward pool. It is recommended to bring frames with high survivability, Rhino, Nigus Inaros, Chroma, etc. unless you can do high damage to the enemies in a short amount of time.
All you need to do in Rathuum is kill the executioners that spawn, but you need to be the first to get 25 points to win. It has a fairly low drop rate, so it’s probably going to take you some runs before you get it.