Complete the “Echoes of the Future” mission with Zeratul killing 50 Zerg units on Normal difficulty.
Absorb 10,000 damage for your ally with Artanis’s Shield Overcharge in Co-op Missions.
Kill 50 units with Artanis’s Orbital Strike in a single mission on Hard difficulty.
Kill 50 units with a single strike of Artanis’s Solar Bombardment on Hard difficulty.
While playing as Zerg, warp in a Zealot in a Melee game.