create a mob that looks like a iron_golem which has the following appearance: 'Create an Iron Golem that looks like a towering ancient statue covered in glowing runes and moss, with cracked stone textures and glowing eyes that pulse when it moves or attacks.' and the following behavior/capabilities: 'A golem that does not spawn naturally. When summoned, it automatically places a chest. It reads a .schem file from the schematic folder and sends a message listing all required blocks for the structure. To begin building, the player must Shift + right-click the golem to activate it, then Shift + right-click a chest to select it as the source of building materials. Finally, the player Shift + right-clicks the desired location, and the golem builds the structure at that spot using only the blocks from the selected chest'
