Privateer Press have posted a preview of the Warmachine Koldun Kapitan Valachev Unit Attachment..
From their website:
Koldun Kapitan Valachev brings the iron strength of the Motherland to mercenary units fortunate enough to serve under his command. Skilled in the dark sorcery of the Greylords, he can chill enemies with icy blasts, propel his unit upfield on freezing winds, or remove debilitating magic afflicting his men. Those serving under him are truly part of Khadoran military machine.