Siegbarste

Siegbarste are rare ogre like creatures, nearly impossible to kill, except when a Siegbarste Gewher with bullets coated in Siegbartse Gift are used.

Last Grimm Standing
When Monroe talks about who he was kind of insane to be trusted by a Grimm to go into Marie's trailer, he complimented by saying it was because the Siegbarste "beat the crap out of him."

The Thing with Feathers
The Siegbarste from Game Ogre is seen in reused footage as flashbacks in Juliette's memory from what she and Nick have experienced together.