Have 21 Zerg units morphing simultaneously in an Unranked or Ranked game.
Use the A.R.E.S. to kill the Brutalisk in the “Piercing the Shroud” mission on Normal difficulty.
Complete all the Prophecy mission achievements.
Score the rank of Gold in the “Tactical Command” challenge mission.
Deplete 10 Rich Mineral Fields in a single Melee game.