Which monster do you like the most in Heroes 5 at level 5?

True, true! IMHO, if you compare the increase in stats, Hydras are roughly equivalent to Unicorns, but their functions are so different that it's hard to directly compare them and say who is better. Hydras have more HP and can attack without retaliation, so IMHO they would defeat Unicorns, but that doesn't mean Unicorns are worse than Hydras. In real-world conditions, Hydras might not be very useful due to their low intelligence, and they might be defeated in the end. Or, on the contrary, they might decide the outcome of the battle when only they remain, the enemy will be in agony trying to finish them off with the remaining troops, the Hydras will die slowly, and the Warlock will cast powerful spells and ultimately win with only Hydras. Unicorns, I agree, are not capable of that. As for Liches, that's a completely different story; they are ranged attackers and casters, again very useful, but with completely different functions.