Just need to win 2 games in Training, Versus A.I., Unranked, Ranked, or Tournaments for Tal’darim Colossus. Nova one has been known for a while but they haven't added it to the game yet (will be added before or on release of first mission pack in Spring 2016).
I picked it up way back, $15 for 9 missions that are hopefully not terrible or even fun if they do the ghost missions right may be worth it. At least it keeps supporting the SC2 team giving them a better than minimal budget to motivate/allow them to keep working on/invest in the game.
Edited by Sainesk - 2/11/16 at 6:02am