Wintertouched and Lasting Frost

[Trainz]

Trainz- Technically yes. However, many of us suspect that this was an oversight. The feats seem designed to boost spellcasters who create their own magical energies, rather than being feats taken by a player that somehow make their items more powerful.

Fair enough.

Did WotC rule on this SPECIFIC case?

 

[Thundershield]

Fair enough.

Did WotC rule on this SPECIFIC case?

Yes, according to an official Q&A, as quoted earlier by Droogie128, the combination of a Frost Weapon, Lasting Frost, and Wintertouched works, though many regard it as cheesy.

I usually leave it up to my players how cheesy they wanna feel playing their character.

"We killed Orcus!" "No wonder, you Avenger of Tempus/Unveiled Visage/Punisher of the Gods combo-abuser. Feeling heroic now, huh?" <-- Fortunately that combo doesn't work -that- well anymore, though it's still awfully powerful...