This spell is a part of the Psy Dagger spell chain and is found in the Psy Dagger rune stone.
The mind, at its most focused, is a force. Not metaphorically - literally. The mentimancer understands this better than most, having spent their practice learning exactly what the mind can impose upon reality when it commits completely. Mental Force is that understanding given to someone else.
The mentimancer reaches through Dream and pours focused mental energy into an ally of their choosing. This is not a subtle nudge nor is it a gentle encouragement, it is the full concentrated weight of a mind that has decided this person is going to hit harder and hit true. The ally glows faintly, the mental energy settling over them like a second skin. Offensive and Bow Power increase by 2d12 as the mentimancer's conviction moves through every strike. And those they hit find themselves knocked down, the force behind each blow carrying the unstoppable momentum of a mind that had already decided, before the swing landed, exactly how it was going to go. The mentimancer receives none of this. They gave it away. That was always the point.
Weapon Effect: Mental Force
Increase Offensive Power by 1d12.