From TMW: rEvolt
May mutate 2 attributes up to 30%.
JackO's are a hard-to-kill monster, and have a lot of HP as well as attack speed. They are quite hard to hit, more so for the lower level players, but noting their high level of monster points, these can be an enticing challenge for any player. At one stage, before the bowels of hell opened even further during the great earthquake, these were the hardest monsters to kill, but now they are just one of many.
For the daring adventurer, there is a lone Jack O in a cave, just to the right of the green snake field. To get there one must pass through many black scorpions in a cave that breeds these by the dozens. They are also found in the deeper parts of the graveyard, as well as the occasional cave.