16 cards where the card types include “wraith” or the text includes “wraith”

Bog Tatters (Zendikar #84)
Bog Wraith (Magic 2010 #86)
Canoptek Wraith (Warhammer 40,000 Commander #153)
Dirtwater Wraith (Mirage #117)
In the Darkness Bind Them (Tales of Middle-earth Commander #58)
Lord of the Nazgûl (Tales of Middle-earth Commander #60)
Minas Morgul, Dark Fortress (Tales of Middle-earth Commander #514)
Nazgûl (The Lord of the Rings: Tales of Middle-earth #100)
Odylic Wraith (Weatherlight #77)
Ringwraiths (The Lord of the Rings: Tales of Middle-earth #284)
Sauron, the Necromancer (The Lord of the Rings: Tales of Middle-earth #106)
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)
Witch-king, Sky Scourge (Tales of Middle-earth Commander #511)
Woodwraith Strangler (Ravnica: City of Guilds #241)

The message was clear to Sorin—time to search for something else.