Orc shamans are a special unit of the Greenskin faction. They are not very durable, have zero armor and cost a lot. A plus is that a unit consists of a single orc and deals tremendous damage. The greatest advantage of this unit is the special ability to cast shield on its allies. Through several turns, the affected units gain extra health points, which are lost the moment the unit takes some damage. This way, while not heling per se, it is possible to protect an important unit from death or to strengthen a unit that battles in the first line.