While technically alive, magnagogs have little in the way of personality and are driven via telepathic command.
Most folk would call an argillomatus a clay golem. They would be wrong.
In the middle of an unimportant combat with some bandits a burst of wild magic transforms all of the PCs and their opponents in to random animals and monsters. They retain their intelligence (though not, of course, the ability of speech). They can either carry on the combat in their new forms, panic, or otherwise react how they see best. After about an hour, they return, unharmed, to their normal form.