Psionic (Long War)
Psi powers have been significantly overhauled in Long War. Psi talent is now trained, not discovered, so with enough time and attempts, every soldier can be a psionic (barring some exceptions). There are many more powers distributed among more levels.
Training
Psi XP
After Xenopsionics are researched, soldiers will begin accruing Psi XP by going on missions. After the first round of training, they can also gain Psi XP by successfully using attack powers or resisting powers.[Verify?] Reaching a threshold of Psi XP is required to undergo Psi training. Every round of training takes approximately 7-10 days, and is affected by the tester's will score.[Verify?]
The required training XP:
- Level 1: 100
- Level 2: 250
- Level 3: 500
- Level 4: ?
- Level 5: ?
- Level 6: ?
Success rate
The success rate of the training depends on the soldier's Will and the level. If the target Will for the level is equal to the soldier's Will, the chance is 50% (25% if More Than Human is active). It increases asymptotically to 100% at inifinte Will and drops to 0% at 0 Will.
The target Will values are:
- Level 1: 60
- Level 2: 70
- Level 3: 80
- Level 4: 90
- Level 5: 100
- Level 6: 120
Limitations
MEC Troopers, Officers and soldiers with the Neural Damping genemod are incompatible with Psi powers. They cannot undergo Psi training, and Psi-trained soldiers cannot become them.
Psi powers
One power from each level can be chosen.
- Level 1: Psi Inspiration, Mind Merge, Psi Panic
- Level 2: Mind Fray, Neural Feedback
- Level 3: Distortion Field, Regen Biofield
- Level 4: Telekinetic Field, Psychokinetic Strike, Psi Shadow
- Level 5: Mind Control
- Level 6: Rift
Unlocking Psi powers
By default, only Psi Inspiration is available. Unlocking further powers is accomplished by performing autopsies and interrogations. One exception is Rift, which requires an in-battle accomplishment.
Psi-powers are now more effective based on the will score of the caster. For instance, Mind merge will add (will/25) hit points.
Effects on fatigue
A psi-trained soldier takes longer to recover from post-battle fatigue. The increase is 6 hours per level of psi training.[Verify?]