Clearing out the attic and found this heavy metal base covered in sharp spikes. It’s rusted and looks dangerous. What is this?

Clearing out the attic can often feel like embarking on a treasure hunt. Among the forgotten boxes and dusty old furniture, you might stumble upon objects that are both intriguing and bewildering. Recently, while rummaging through the attic, one such curious item was discovered: a heavy metal base covered in sharp spikes. It was rusted and appeared dangerous, leading to immediate questions about its origin and purpose.
While at first glance, this object might seem like a relic from a medieval armory or a part of a decommissioned machine, there’s