DLC Markarth. DLC.

The grand adventure "The Dark Heart of Skyrim" ends in Markarth - the Gray Host is about to attack the Reach. Meet the clans that inhabit this wild land and enlist the help of unlikely allies to uncover the true plans of the enigmatic vampire lord Rada al Saran.

Suitable for both Steam. So for the game purchased on the off site of the game.
The DLC is sent as a gift in the game to the specified @USER ID.