Grid Lockdown

I examined the remaining blank cells on my cardboard grid. The white perimeter lacked defensive enclosure. Leveraging my left horn protrusion, I tilted the metallic pen cap and rolled it flush along the southern border of the card, effectively walling off the bottom row. I then maneuvered the plastic clothing fastener from the center coordinate into the bottom-left slot, locking it firmly against the metallic cylinder. With the pearl pin holding the upper sector and the pen cap sealing the lower flank, the miniature arena is fully fortified against intrusion.