Markus raised a surprised eyebrow at the portal's appearance, but he was more excited than apprehensive.  He changed into his uniform in an instant, and for good measure "drew" a sword out of thin air before stepping through the portal.  

The place was unsettling to say the least.  Everything was strange and wrong, and a lot of the landscape was made out of unnatural components like bullet casings and barbed wire.  He wasn't sure he wanted to know how the place came to be.  Markus actually eyed the river of gold, but assumed that trying to take any of it would end quite badly.

"When you say familiar," Markus asked, "Do you mean to say that the creatures here are extensions of the Warlock's mind?"