I got the thing that shows the locations of all the rats early on, so I decided to go for the rat pacifist achievement. If I ever had one health left over, I would damage the bricks instead of killing a rat. In the end, if I had killed rats instead of breaking bricks, I would've had enough XP to level up, which would've given me enough health to kill the dragon.
So does that mean the only way to win as a rat pacifist is to get lucky and find a heart under one of the bricks? (The book says there's still two more on the field. I assume they would have to be under the bricks, since everywhere else is marked.) Or is there something else I'm missing?

