So what is the map icon showing a boss like demon head on the map, the harbingers one I noticed from 1.1 and those emprisoned things that drop items with blue fractures or whatever alchemical name they have I know, but there are some demon head minions that are quite like bosses, what are those and when they were introduced ?
They are champions. They were introduced this season.
The imprisoned things are also related to this season’s mechanic, the woven faction.
You should check the News threads for details.