Well, you didn't tell us much.
I'd need a bit more info about what should this new thing be to tell anything reasonable.
Well, I'm not completely sure yet, I'd have to design it first. And I don't really want to work on this if it's not going to get implemented... Well, the vicious circle.
I am thinking about things like this (cherry-picked from various threads):
- Psi Strike: The target must take a psionic test. Failure will result in health damage, ignoring armor. The test is based on a roll taking into account the psionic strength of the victim and the psi power (Str * Skill) of the user. Mindfray deals no fatal wounds.
- Psi Stun: Like Psi Strike, but deals stun damage. (Intended to be weaker.)
- Psi Disturbance: Reduce the target's TUs, Stamina, Reactions, Firing, Throwing, Strength and Melee by a percentage, depending on test result.
- Inspire Unit: Boosts morale and heals Fatal Wounds. This power will never fail and the effects are based on the user's psionic strength and skill.
- Psi Scan: The unit gets PsiVision equal to their Psi Strength/10, until the end of turn.
- Blind: The target's vision range decreases until end of their turn, often to 0.
- Suggestion: Point any location on map. The target unit will now think it's extremely important to get there (a temporary node with very high Importance, which only works on one alien).
But these are just examples, not my actual ideas to implement.