If you threaten to commit any crime of violence in order to terrorize another person or to evacuate certain areas, or in reckless disregard of causing terror, you are guilty of terroristic threats. Or if you communicate with another person with the intent to terrorize or in reckless disregard of causing terror regarding the location of any explosive or similar device (whether or not the information is true), you are also guilty. The penalty is up to 5 years in prison and/or up to a $10,000 fine. See here.
The preceding was a summary of the law. It does not describe all of the elements of the crimes. Laws are also constantly changing. You need to contact a skilled Terroristic Defense Attorney in Minnesota to discuss the offenses in detail and with respect to your own particular case. Nothing in this description or anywhere on this site is legal advice.