I don't think the Tower of Babel can be tied specifically to any civilization (since it was kinda the birth of all of them), but w/e.
Babel needs a location that it's banding ECs from.
Tower of Babel - What's an "Upkeep draw"? Also, is X the # of Babs set aside that time, or the # of Babs set aside when one set returns?
Also, holy CBN Batman. I don't really think they all need CBN.