Traveled a long way to get to a 1.4.2 Fortress. In case you didn't know already, wither skeletons only spawn on 1.4.2 Fortresses. I managed to get 3 of these skulls in about an hour. Good day for me. Enjoy 1.4.2 and Happy Halloween!
In single player it will convert the map bud. Believe me, You have to travel no less than 5k into the nether, to reach new land, and find a new 1.4.2 fortress. Be prepared, new fortresses also spawn 'rogue' blazes. And they spawn quite a bit more than their wither skelie brothers.
I've just made it and I needed about 3 pairs of pants along the way due to some close calls... Good amount of skellies though.
because people have things in the wild. This also makes the new things a little bit more valuable. Which is nice to have some things to raise the economy a little