Armageddon

Armageddon drops a large number of bombs over the entire battlefield. Despite the description, it won't literally kill every unit on the battlefield -- most heroes have enough health to survive it, for example -- but it will certainly kill all normal units and do substantial damage to the survivors.

The Armageddon proceeds as a wave of bombardment, similarly to an artillery bombardment, extending the whole length of the battlefield and progressing across it from one end to the other, with a slight delay between each wave. While this is happening, there are also four big explosions which do 1000 damage with a radius of 8.