A Fortified Perimeter

You called that horned shell Bowser. A fitting name for a heavy sentinel. Since he refused to yield an inch, I treated him as a fortress. I hauled two wooden building blocks across the rug, testing their heft against my fists, and wedged them against his flanks to secure the perimeter. A fallen plastic ruler became a barricade at his feet. If this territory is contested, it will be held with structure. I tested the perimeter with a firm shove; nothing budged. The line holds.