I was just going to report this. Here is some additional information.
The Winter Wind spell is a skill learned by 2 heroes Korthox the Ice Lord and Drogon the Dwarf. It is designed to move Korthox the Ice Lord or Drogon the Dwarf to an arctic tile. However, if you have recruited both it will only target Drogon the Dwarf, you cannot target Korthox the Ice Lord.