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Forma: Drop sources, locations, and probabilities

Tips

There are many ways to get Forma in Warframe, but my recommendation for optimal efficiency would be to try one of these missions (in this order):

  • Deimos/Hyf : It's a Defense mission (level 15-20). The item is dropped on rotation C (22.56%).
  • Earth/Cervantes : It's a Caches mission (level 4-6). The item is dropped on rotations C (2.00%).
  • Sedna/Yam : It's a Arena mission (level 60-60). Probability to get it: 0.50%.
  • Sedna/Vodyanoi : It's a Arena mission (level 85-85). Probability to get it: 0.50%.
  • Earth/Cervantes : It's a Caches mission (level 4-6). The item is dropped on rotations C (2.00%).
These recommendations are based on the usual missions lengths, and the probability of getting the resource dropped.

Missions with a Chance to Get Forma as a Reward

Planet / Mission Type RotationProbability
- / Sorties Sortie 2.50
Earth / Cervantes Caches C 0.50

Warframe Rotations Explained

  • Defense: One reward every 5 waves, following this pattern: AABC.
    So, rotation A reward at 5 and 10 waves, B after 15 waves and C for 20 waves.
    Then it starts all over again.
  • Caches: Number of resource caches opened:
     - Rotation A: one.
     - Rotation B: two.
     - Rotation C: all three.


Mobs Dropping Forma

EnnemyProbability
Ancient Molted Cask 100%
Molted Cask 100%
Rare Orokin Storage Container 100%
Reinforced Orokin Storage Container 100%