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Nice and simple, sticks to the theme quite well.
As others have mentioned there is the issue with the growths' attack but that can easily be fixed.

Love the mood board. Nice and consistent colour theme and includes the OPR Logo for bonus points.

Sticks close to the theme, has a fun risk/reward with the spawning units, but needs some formating work.  For instance, I think a full stat line for a "Spawned Defender" would be prefereable to leaving their rules crammed into a table cell.  For instance, the immobile unit doesn't have a range for its attack, yet it has a proactive attack phase called out.  How should it use this phase?  It can't charge and has no ranged weaponry.  It's also unclear where to place a spawned unit when one already exists.  It is possible with a lucky set of roles that one objective could get 3 spawns in a single turn, and a 'line' of spawned forces could conceivably be placed end-to-end such that the last spawn might be entirely outside of the control zone for the spawning objective!

This is one of the better ones I've rated so far - good adherence to the theme, although I think the rules could do with a bit of clarification and simplification.

well Done. Keep it simple.