Flying units in Heroes 2.

Damage: 25-45! Only chromatic dragons deal more damage!
Health: 150. More than chromatic dragons and titans, the same as giants. So, the bone dragon ranks 5th or 6th in terms of health!
And finally, the cost is 1500! And without any resources!!!!
In addition, it has abilities: mind control magic doesn't work on it, including berserk and blindness. Also, the morale of the opponent is reduced by one point.
And if you add the relative ease of building (second week without building vampires, second or third week when building vampires), the lack of resources for purchase (as a result, ease of building the magic guild), and the fact that the "raise dead" spell is only level 3, then this unit is good!