I just didn't have enough gold for the knuckle upgrade :( I gave the money from the Dragon Utopia to the greens so they could connect. I exchanged all resources for gold.
But why? There, 31 green dragons joined just like that :)
I'm telling you, I spent five hours maximum passing through, didn't minimize losses or anything. The surprise came when I saw the boots were guarded :( I had to urgently move the entire army there. I was afraid it wouldn't be enough to kill the villains.
The games here last a day maximum, and you spent half a day — you could have squeezed something out of it, and losses didn't actually play a significant role...