Minions, such as Golems, Skeletons, Skeletal Mages, Revived creatures, and Hirelings, may disappear or no longer be under your power if you allow them to get too far away from you. Check the Automap and make sure you stay with your Minions. You can use a Scroll of Town Portal, dungeon steps, or waypoints to collect your Minions. Sometimes Minions may warp in around you if you get too far away from them, although this does not always happen.