Attack for 20 seconds with no counterattacks in an Unranked or Ranked game.
Score the rank of Gold in the “Infestation” challenge mission.
While playing as Zerg, warp in a Zealot in a Melee game.
Score the rank of Gold in the “For the Swarm” challenge mission.
Kill 50 supply worth of units within 15 seconds in a Melee game.