Break in

For the first part of my plan, I scouted the surroundings of the fortress for the right monster. It had to be just so. Just big, bulky, aggressive, and stupid enough to work as intended. Good thing was that by then I had a good idea of which monsters qualified.

Insects were the stupidest, but least aggressive of the bunch. They didn't have enough brains to pursue the prey with a determination that can only come from stubbornness. That required some personality from a monster, and personality required brains, which insects lacked.

Mammals were better in that aspect, but some of them were too smart. They might just ditch me and my plan entirely.

Reptiles were the golden middle ground. They had brains, but they were lizard brains. Barely enough to get by, in most cases.