doom catches a draft

The quiet of this room was breached by an insolent hiss from below. Marching across the hardwood terrain toward the perimeter wall, I confronted the source: an ornate brass grille embedded in the floor, spewing an invisible, warm gale into my airspace. Such unruly atmospheric forces cannot operate unchecked within my sector. I located a heavy, multifaceted glass paperweight resting nearby. Gripping its cold edges with both gauntlets, I shoved the dense crystal directly over the primary damper lever of the grate, forcing the internal metal louvers shut with a decisive metallic snap. The thermal tempest was instantly severed. Climate itself now obeys my mandate.