Okay.
@Petricus Euryale I have a couple of ideas I wanted to run past you. I'm thinking I'm going to make a Slavic knight, specifically apart of the Kievan Rus. I'm still nailing down the details and doing research for the particulars, but I'm thinking he was a member of one of the Rus' princes personal guard or some such. I'm also thinking that he earned his experience fighting monsters and mastered his magic fighting the Mongol invasion of his prince's lands, then his prince sealed my character and a couple other of his best fighters away before he surrendered with the intent to release them later so they could help take his lands. The prince died before he actualized his plan, and the Knights Templar (I'm fairly sure my character will be connected with them somehow, not sure how yet) ended up reviving my character in the current day.
Basically, the thing I want to check works for you and everyone else is that the Mongols (specifically the Golden Horde) are allied with the monsters we hunt, or at least had a number of said monsters under their control.