Jade Phoenix Cheatsheet+Free Or Non Actions+Empowering Strike

Beginning at 4th level, when you successfully attack an enemy with a martial strike, an arcane spell that you cast before the end of your next turn is empowered (as by the Empower Spell metamagic feat). Casting a spell that has been empowered through this ability does not increase the effective level of a spell you cast. You do not need to know the Empower Spell feat to use this ability. You can use this ability once per encounter.