Makar
The Makar was a Romulan  warbird that was in service with the Tal Shiar in the late 24th century. The Makars cloaking device was modified to prevent detection by Dominion sensors at speeds under warp 6. 

In 2371, the Makar was part of the joint Tal Shiar/Obsidian Order fleet that attacked the  located in the Omarion Nebula. The ship was destroyed in the subsequent Battle of the Omarion Nebula, becoming one of the first ships to lose main power. ()

Later when Captain Benjamin Sisko noted to Federation President Jaresh-Inyo that the Bajoran wormhole was "opening and closing for no apparent reason", Odo continued that they "didn't detect any ships coming through at the time," however added, "but the Dominion might have been using some kind of cloaking technology." When Jaresh-Inyo pressed the matter, with regards to his belief that the Dominion did not possess cloaking technology, Odo responded with the theory that "the combined Cardassian and Romulan fleet that the Dominion destroyed in the Gamma Quadrant was equipped with cloaking devices. Who knows what my people might have taken from the wreckage?." ()

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Makar