That one trap took away 548 hp even when 6 hours of it were under water. Looking at this log, traps are death sentences for villagers. 9 hours of -9 or -7 hp each prog if not in water or -6 and -5 if in the water and between 6 and 12 of those per hour. On the absolute lowest end if they were all weak burns under water that's 270 hp and on the high end if they were all high burns that's 972 hp lost + the initial damage -49. And on top of all this, the damage was through fire resist which is -33%!