Ranger – “Emerald” [5th campaign, 2nd mission]

Honestly, it's a stupid mission! But I did it this way: I started building something before I even started swimming (before the Druids). And I kept swimming until I cleared out the center. Then they gave me 3 dragons, and when I cleared out the bottom left, I got 5 more! I couldn't pass: I had an equal number of dragons, but it still didn't work! And the trick is that you need to complete it with an army consisting only of Elves! And you can have even one more dragon; that doesn't matter!