Tickets for the show goes on sale Friday for the Mill City Nights show: Combichrist/The Birthday Massacre tour. You can also buy VIP packages for their show here. I should note when buying the VIP package this does not include ticket. For Combichrist VIP packages, go here. Again, you have to buy the ticket separately.
According to The Birthday Massacre on their Facebook page, MXMS featuring Jeremy Dawson of Shiny Toy Guns will be touring with the bands. Judging by what I have heard, MXMS's music sounds really awesome.
You can hear other tracks on their sound cloud page.