Using a Merchant Transport, supply all of the ally Trade Docks along the river before time runs out. Use the speed boosts and extra boats the allies give you to get through the Marauder obstacles and traps. REPEATABLE - 12 hrs.
Delphi Limestone can be pretty hard to come by around here. If you would like some, you will need to do a little bit of work first.
The only local source is at the end of a Marauder-infested river. To get there, you will need to sneak, smash, and rush through numerous enemy obstacles and traps. To get some help along the way, supply Food to each of the ally Trade Docks. They might be able to lend you a boost of speed or some extra boats along your route.
Be quick to act and quick to think; the Marauders are known to constantly change their obstacles and traps. Good luck.
I love the smell of Delphi Limestone in the morning.
Good work! Don't trade this Delphi Limestone all in one place.