Hanging by a thread

After the genocide of all elderly wizards, the surviving families went into hiding Following a prophecy, the wizarding colonies around Europe assembled a council of their own, destined to overthrow the tyrant currently terrorizing the world. Thanks to an accident though, the new council ends up stranded in the Amazon forest with no means of communication or ways to return. How will they bring down the tyrant if they are stranded in the middle of nowhere?