After the Enterprise-D entered asteroid gamma 601 to salvage the Pegasus, the Terix "accidentally" sealed the starship inside during some "geological experiments." The Terix offered to transport the crew of the Enterprise-D out, but the starship escaped on its own using the Pegasus's phasing cloaking device. (TNG: "The Pegasus")
The Terix was Tomalak's flagship during a face-off in the Romulan Neutral Zone in an alternate 2370. (TNG: "All Good Things...")
The Terix is a prize ship, so not available in retail format, so she is not easy to get hold of. lets take a look and see if she is worth it.