What is a mage bomb?
It is a mage casting blizzard on the area in which he is standing. The blizzard won’t hurt the mage. However, it will kill any of the usual armored units that try to attack the mage. If, after starting a mage bomb, the mage casts a very brief blizzard on a group of enemy units, those units will charge into the mage bomb and all die. Mage bombs are especially effective when used in the middle of the enemy miners and when used by invisible mages. Note that death knights can do this by using the death and decay spell. A hasted, unholy-armored death knight doing a mage bomb is extremely deadly.
