Necromancer

Raise the dead, then put them to work. You're a necromancer fielding an army of undead - split them into squads, send them marching off to dungeons, and watch the brawls play out, hundreds of units a side.

Win, and your squads haul back the good stuff: bones, coins, corpses, and the occasional soul. Spend it all on a bigger horde, nastier units, and upgrades that make the next horde hit harder.