Dexterity for faster offroad travel speed (3% per dex point according to Pharaoh) and increased bulk carrying
Q: Does dexterity increase your onroad travel speed too? A: It doesn't, that's what speed is for.
You also get a new emote, "Demonstrate Masterful Dexterity," upon completion of this test.
Speed for faster onroad travel speed, better fishing, faster bottling of wine, and a chance of not losing bees when checking an apiary.
For every regimen you complete, you gain 1 Constitution, which lowers the recovery of smoking hookahs and using a toxin kitchen. Passing The Test of Darkest Night gives one the ability to take 10 cobras out of a Serpentarium (once every 14 days) and put them in a basket. You do not get the basket back after putting the snakes into another Serpentarium.