Gem Generator
This icon, which is abysmally small in-game due to the blank space it gets, gives Commanders real Gems each turn.
One who has it will receive the specified Gems each turn ( about Turn Order), directly into their inventory, even when near a Lab.
This is not a common trait; some Artifacts give it, and several Pretender forms have it innately, but your other options are slim.
Sea Kings generate
1 each turn. They cost 55 each, however, not to mention their Upkeep.
One of the three
Earth Kings generates
1 each turn. Each attempt to get him costs 50, however, not to mention the path investment.
One of the Arch Devils generates
1 each turn. There are five Arch Devils, however.
Two of the Demon Lords generate
3 each turn, but those are Blood Slaves.
Late-Age Arcoscephale always gets two Water-Priests that each generate
1 each turn. Not very fair, if you ask me.
Late-Age Phlegra's capital will eventually spit out someone who generates
2 each turn, and they get another if they find another Volcano.