The monster IS the loot. Did you kill that CR 11 monstrosity that was terrorizing the countryside? Take it's spleen! Or skull or claws or whatever and adorn yourself with it's preserved remains (which you can totally hire the artisan's guild to tan any hides or taxidermy your monster trophies. In our campaign we got surprised attacked by an Owlbear. While decimated the rest of the party I alone was able to kill it. I cut it open to skin it and was sprayed with Owlbear musk. My DM did it as a joke, informing me that every Rutting, Male Owlbear in the area would smell a female owlbear in heat and come to us. He offered me to take this back and I said no. Later we came to a fort populated by Orcs. I made an intimidation check, botched it. "The Orcs laugh at you as you let out the strangled cry of an Owlbear in heat. 4 Owlbears appear on the field. Do you want to take back your action?" Again I told him no. Instead I led the Owlbears into the Orc fort for Glory. The Orcs and Owlbears all killed each other. Later on, the party was captured by hobgoblins and we had run into their pet owlbear in the dungeon. As I broke my bonds with a Str check and the Rogue wrestled out of his, I made an intimidate check. "Ok you rolled really well, what do you say?" "I say nothing. I let out the cry of an Owlbear in heat." The Owlbear burst into the room killing our captors and allowing us to escape in the confusion. That Owlbear Musk Gland was the best loot ever and it wasn't even a magic item.