Tactics for the Swamp (Fortress).

By the way, I hadn't noticed: does expert-level water magic only weaken one serpent at a time during an attack, or all of them? Or does this property only occur on magical terrain?
P.S.: And Azure Dragons aren't for me. I'm increasingly drawn to Shades of Darkness. =)

Dragonflies don't cast Weakness; they apply it automatically to the unit they attack. If a unit casts a spell (instead of taking a turn), the spell will be area-of-effect only on magical terrain, regardless of the hero's magic level.
Azure Dragons and 3 other new types of dragons appeared in Armageddon's Blade, so in Shades of Darkness, they are already flying around (the crystal dragon doesn't fly; it runs).:D