I want to use Wintertouched + Lasting Frost as a sorcerer, but I don't like many of the Cold Sorcerer powers. Can I make my Implement attacks do cold damage with a Frost dagger? Or does that only work with Weapon attacks?
The Frost weapon does not specify that it applies to only weapon attacks. It says:
That means all, even implement damage.
The contrast here is between damage dealt "by a weapon" (includes weapon and implement powers), and "by weapon attacks" (or similar) which would only include weapon attacks.