7 cards where the card types include “wraith” and (the card is available on Paper) and it’s legal in Modern

Bog Tatters (Zendikar #84)
Bog Wraith (Magic 2010 #86)
Nazgûl (The Lord of the Rings: Tales of Middle-earth #100)
Ringwraiths (The Lord of the Rings: Tales of Middle-earth #284)
Street Wraith (Dominaria Remastered #102)
Witch-king, Bringer of Ruin (The Lord of the Rings: Tales of Middle-earth #293)
Witch-king of Angmar (The Lord of the Rings: Tales of Middle-earth #114)

This search is finished. Now the real work can begin.