Core:Heightening

Some abilities allow you to heighten them. In these cases, you can choose to spend additional MP as you execute the ability and the effect will be altered in some way described in its "Heightened" text. Abilities that don't have this text cannot be heightened. You can only heighten abilities you are proficient or fluent in and, even then, can only heighten up to the corresponding bonus. If an attack ability is heightened, it gets +1 to hit per level of heightening. If a feat ability is heightened, it gets +1 to the DC per level of heightening.