Though the Cardassians have been part of the Dominion (Deep Space Nine comes to mind) - they have left it a long, long time ago. So the Gamma Quadrant Tribble grants +5% damage vs. Dominion (Ground) forces, which currently means Jem'hadar and Founders (changelings) only.
Comments
Taskforce 47 Falkenwacht (Federation) / Greifenreiter (KDF)
(at) deianirrah
Free Gear and where to get it