I'm working with an homebrew artifact from this file, page 34, but the way its (poorly worded?) powers work baffles me. The artifact is a morning star, but it has an attack without the Weapon keyword ...
The Primordial Adept theme, which gives rod proficiency and has Implement-keyword powers, mentions no restrictions or caveats to its powers' implement use. Do only rods work for Primordial Adept ...