Empire of Magic is filled with any number of bad game design decisions, the action point system being the worst. Each unit has a number of action points that they can use to move, attack, and cast spells, and characters on foot have fewer action points than characters on horseback. If you're out of action points, you can neither move nor attack, so running out of action points near an enemy is the fastest way to find yourself at the load screen if one of your heroes is killed. And your hero will always be killed, because the computer always attacks him, no matter what difficulty level you choose to play on. You're also limited to only three units in any stack, and you can't have multiple heroes in one stack.