As an action, you curse up to two creatures you can touch or see within 10 meters and within 5 meters of each other. Each target must make a Will saving throw. Whenever a target that fails this saving throw makes an attack roll, ability check, or a saving throw before the spell ends, the target must roll a d4 and subtract the result from the attack roll, ability check, or saving throw.
You can target two additional creatures for each additional mana or psi expended. The creatures must be within 5 meters of each other when you target them.
You can expend 2 additional mana or psi so the target must roll 2d4.
You can expend 4 additional mana or psi so the target must roll 3d4.