Auto-translated
I completed the second mission. The result wasn't great, but that's okay. The weekly bonuses automatically replenished, and after capturing the third Elven castle, a menu for reinforcements appeared, but it never actually provided any. And I even received the bonuses for the next mission, as it should be.
Meanwhile, the difference between what I saw in a walkthrough with a mod and playing without it is significantly more challenging. The Elf is relentless. For five weeks, he was constantly on my tail, circling on a boat while building up an army to put up some resistance. He was always just one step away from attacking, afraid that if he took another beacon, it would be a problem. And this is what happened, thanks to that Darkness, even though it's just the beginning.
This is how he arrived on the second week, 2 months later.

And here's what it looked like on the 7th day of the 2nd week, 3 months later.