Cards you know you should freeze but keep active for bad reasons
thought this might be fun.
For me it's mother horta and mirror laforge. Both were early 4\*s for me both in general as well as getting immortalized. Neither gets much use anymore although Laforge had two traits for gauntlet a week or two ago so I used him.
In the case of Horta I like the episode and way back in Star Trek Online they had a baby horta that could follow you as a pet and I went out of my way to get that achievement. For Laforge I just love his artwork