Empower Mystery

Type: Metashadow
Source: Tome of Magic

You can cast mysteries to greater effect.
Prerequisite: Any metashadow feat.
Benefit: Once per day, you can apply the effect of the Empower Spell feat to any mystery you cast. All variable, numeric effects of an empowered mystery increase by one-half.
Casting an empowered mystery is a full-round action.
Special: You can take this feat multiple times.