I didn't write this myself, but I agree with this opinion:

"A large flying creature with guaranteed damage—that is a brief description of the angel in this game. It cannot compare in power to the black dragon or the titan, but it can certainly hold its own against the rest. In its archangel incarnation, it flies faster and all characteristics are higher, but most importantly—it resurrects allies; and he who loses less in battle will sooner or later emerge as the victor.

And so, fanfare! The most powerful monster in the game has arrived!

Yes, the black dragon still lives up to its fame. It flies, breathes fire, is immune to magic (alas, its younger brother, the twilight dragon, was deprived of the latter), has the strongest attack, and the most hit points. In short, it has no equal, period.

Should it be buffed? Yes, a thousand times yes! Let it cost 4500 coins, let your own spells not work on it; at this stage, your troops will suffer the most from enemy magic. Which means the black dragon is the weapon of victory!"