As mentioned, the Guardian 921 is available in black only, and aside from some odd angles and an unusual window shape it appears rather conservative for one of NZXT's Crafted chassis. The front of the case has a large three-pointed LED light bar in the center, but your attention is taken by the apparent oversized LCD panel at the top. It extends up above the top of the case by a good inch or so, and does consume some space normally reserved for external 5¼" drive bays. The very bottom part of the door has a vented opening for airflow to the front intake fan.
The rear of the case shows the typical top-mounted spot for a power supply, along with 80, 92 or 120mm exhaust fan location. No motherboard I/O back plate comes installed on the Guardian 921 however this is usually unique to, and provided by, the board manufacturer. There are seven expansion slots with snap-out covers and two round openings with rubber grommets for running water cooling tubing out the back of the case.
The side panel window is sort of an odd shape however it's refreshing to see something other than a plain rectangle used here. The side 120mm fan is mounted directly in the center of the panel and uses slots in the Plexi along with a silver mesh screen to provide the airflow. Two USB ports, headphone/microphone audio jacks and an eSATA port are aligned along the edge of the front panel. The front door opens to reveal a finished back held shut with magnets. Due to the oversized LCD at the top, only three 5¼" bays are available externally, along with two 3½" bays. The bottom is taken up by another section of mesh for the intake fan. There are no wires for the front LEDs visible at the door hinges; NZXT has done a good job of hiding those. The top mounted LCD panel appears huge, although as we'll see later only a small section at the center actually lights up. There's a small metal NZXT badge affixed below the panel with the slogan Crafted Gaming Armor in small text beneath it.
Now for a closer look at the interior.