You have learned a limited way to access psychic magic.
Benefit: When you first prepare your spells for the day, you can prepare one spell as a psychic spell. This spell must be at least 2 levels lower than the highest-level wizard spell you can cast, and takes a slot 1 level higher than the spell’s actual level. When you cast this spell, it operates as a psychic spell, including using emotional and thought components in place of somatic and verbal components, and only having expensive material components.
Pathfinder Player Companion: Magic Tactics Toolbox © 2016, Paizo Inc.; Authors: Alexander Augunas, Steven T. Helt, Thurston Hillman, and Ron Lundeen.