Pentagonal Chamber

The chamber materializes around the Third Doctor with sudden, wrenching violence: angles cut too sharp for mundane geometry, its five intersecting planes converging toward a distant point like the claw of some frozen titan. The surfaces drink the light—dull metallic finishes absorbing color, leaving only the reflection of flickering blue diagnostics that trace veins across the walls like circuitry or nerves. The air hums with low-frequency resonance, the vibration thrumming through the Doctor’s ribs even before his boots touch the unyielding floor. Distantly, the sound of mechanisms cycling builds into a crescendo, though no visible doors admit or confound—only the seamless pull of the chamber’s own gravity that pins him in place. The space radiates outward emptily, too large for its contours, as if waiting to receive something vast; the Doctor stands small within its patient hunger, knowing his future selves will soon crowd this hollow.