User blog comment:Rosmar/Did anyone have a idea how to spawn King Slime?/@comment-4085927-20110802004233

You need to be atleast 1/3 away from original spawn, use a battle potion and water candle, to increase your chances. Do this standing on the dungeon, make sure you can see the ground. Box your self in(for safety) and wait. you can leave the computer and come back and king slime will still be there IF he spawns. Try finding a tmod server they can spawn any monster, or search "Terraria boss servers" may net some results.