Pumpkins Golems

The pumpkin golem would be a hostile mob that would live in the Harvest Hills biome ( Part of my seasonal biomes idea). This mob would a appear as a darker pumpkin among others in the pack once night happens the horrible monster emerges out of the ground to hunt any unsuspecting players. As an example this mob could be picked up as a block and placed into your friends base to emerge once night comes and spook your unsuspecting friend ;). I think the mechanic of being nocturnal and being placeable would make it a really unique, fun addition to Minecraft.