Dragogeddon

A simple tactic, in which a hero with good magical capabilities and knowledge of the Armageddon spell uses a force composed of any combination of Black Dragons, Gold Dragons, Phoenixes, Magic Elementals, Fire Elementals, Magma Elementals, golems and Efreeti. Every non-trivial fight, the Hero casts Armageddon, damaging his enemy while his own units are unhurt because they are immune or highly resistant to the effects. For this to be successful, the force should include Phoenixes, Efreeti or either Dragon, both to ensure high speed and therefore high initiative and to be able to handle enemy units immune to Armageddon. Can get real nasty if the Hero gets his hands on the Shackles of War.

A possible counter is the Orb of Vulnerability