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Please remind me what color it is.
I just finished this mission at work and don't remember exactly where it is. :)
Added 18 minutes later
In general, if the All-Dash is brown in the center, you need to level up a bit in the first Castle and eliminate the garrison in front of his Castle (he's not that scary, actually). Then, just approach him.
If it's green at the top, after talking to the second Khan, the Cyclops blocking the way to the shipyard will join you, and then you just build a ship and sail east (along the way, you'll need to eliminate two purple Necromancers at sea - they have quite strong armies, with 35 witches each). When you land on the shore, there will also be a Dark Elf with a good army. Then, just approach the green one as usual.
When you join the second Castle (brown), a turquoise player will attack you from a portal (he had 48 Shamans on the 5th week, not to mention others). You need to defeat him and only then sail to the green one.
We visit the turquoise Orc last (in the former green city, there is a shipyard, we build a ship and sail south, there we land near the shipyard and head west). Before the garrison, there will be a skirmish with a minor character; he will insult you in every way, and you should give it back to him. :)
Well, that's it. After defeating this rude guy, approach the leader, have a normal conversation, and go have a drink. :)
The "visit the northern hero" quest is completed when you visit all four Orcs.
It's a cool mission; I liked it.
Kujin is quite a character. :)