"The Legend". Problems with the walkthrough.

It's easy to defeat fish, but when there are five hundred of them in one slot, and with high morale, they often deal critical damage. The main thing is to attack first. Initially, you'll get one additional slot, and the second one will be more expensive. You can put one unit in there as a reserve – it's the same slot, but the units don't participate in the battle. However, I didn't know that you could put in as many as you want. I need to check that.
You can't buy creatures and avoid running around to different merchants. Well, unless you're sacrificing one of your units as bait while keeping the rest safe.