Cheaper and faster big creatures
In any mission where you can make your races big hard thing do what is needed
for you to be able to get it. When your ready and have the unit needed (EG
Captin for the oblinox) with all the bio upgrades instead of telling it to
upgrade into the collosus, click the worker button. It should make your captain
into a collosus without the use of resources and alot faster.