Recruit a hero to lead your army, and use spells while they fight for you. Mage & Monsters 2 is an active auto battler, where you choose to either enhance the strength of your hero, reinforce the might of your army, or increase the power of your spells.
Patch 0.28g:
Impossible difficulty nerfed: From +300% health and +150% damage to +220% health and +110% damage at level 20.