Awesome awesome awesome
#3 is pretty pwn. Depiction of the Wraiths made me happy, and you definitely improved the hydras.
Also, the use of that single scarab was pretty clever, although the size of a scarab is debatable.
Scout depiction was kind of funky as I said before. Science vessel was debatable as well.
Oh, and the arbiter wasn't bad. However, I probably would have used Recall instead of revealling the Zealots on the ground by decloaking. Recalling them in would have been a lot more dramatic. =P
Pretty damn great though. I'm loving this series.