This is done with barbarian. After defeating two villains or three you should be able to get the knights so recruit some about 20 if you have a lot of gold then go to Elestria and find some nomad then recruit them because they are good in numbers and move fast. Then go to Arcathia and recruit pikemen. Then go to Pearl Islands and recruit lizardmen and then demons or archers. Do not get dragons unless playing as paladin.

When surrounded by enemies close by, use the Hydra's attack on any opponent. All of the Hydra's heads will lash out, and kill one of each enemy.