Bibor
Doomsday Machine
I turned on yields around turn 25 and I noticed higher yields on base terrain around the two AI capitals I had visibility in (Rome and America). They went away a few turns later. AI gets a golden age at start? This was on Emperor.
P.s. City-states didn't get this, their tile yields were normal.
P.s. City-states didn't get this, their tile yields were normal.