When your build step starts, add X counters to this Resource, where X is the number of Neutral units with printed power 3 or more you have in any arena.
Remove 3 counters Choose one: Gain 1 build point. Play only during your build step. Or: Put 1 credit counter on a unit in any arena. Play only during your build step.
Remove 8 counters Each of your Neutral units gets +2 power until end of turn.