The next evolution of these tactics was multi-front cooperative combat.
The Undead Army would serve as the main assault force on the front lines, tearing through the enemy's ranged defenses on the city walls.
The skies would be left to the Extraordinary Dragon Cavalry, who would use harassing and suppressive tactics to disrupt the enemy's deployment and prevent their fragile ranged units on the walls from attacking comfortably.
Underground, a secret commando team composed of Elite Extraordinary Heroes and Elite Extraordinary Soldiers would launch a surprise attack through tunnels dug by Steel Ant Demon Beasts.
Finally, there was the "nuclear bomb," Arthas, who would be airdropped into the enemy's core to unleash Land of Corruption, using the swarm tactics of Undead Magic to snowball out of control from within their ranks.
Imagine: in a conventional siege defense, the defenders only need to focus on protecting the four walls.
