Untmori's Plate. The point cost is shown below the rarity indicator and next to the effect description.
Points are the primary restriction on the strength of an army. Every army can have units that add up to cost a maximum of 1000 points, with the exception of Army 5 which has a limit of 500 points. Each unit component has a point cost indicated on it which add up to determine the cost of the unit.
Currently, the highest point cost component is Untmori's Plate, costing 150 points, while the highest point cost creatures are Steam Behemoth, Death, Famine, Conquest, War, Zamaroth Mythic and Imra'ilh Mythic, costing 150 points each too.