The Darkblaster is a weapon used in the 1985 animated series She-Ra: Princess of Power.
She-Ra: Princess of Power
The Darkblaster was a new weapon developed by Catra to defeat She-Ra once and for all. However, because of the great size of the weapon, it could not be moved from the Fright Zone, so She-Ra had to be lured to it instead.
At the same time Catra saw her chance fit to fire the Darkblaster at the Princess of Power, Shadow Weaver wanted to use her latest spell on She-Ra. The two different attacks interfered with each other and caused a dimensional portal to open, pulling both She-Ra and Hordak into the Dark Dimension.