15 cards where the full Oracle text includes “shadow (” and the card types include “creature” and the color identity is B

Dauthi Cutthroat (Exodus #57)
Dauthi Ghoul (Tempest #121)
Dauthi Horror (Commander Legends: Battle for Baldur's Gate #748)
Dauthi Jackal (Tempest Remastered #95)
Dauthi Marauder (Tempest Remastered #96)
Dauthi Mercenary (Vintage Masters #114)
Dauthi Mindripper (Tempest #125)
Dauthi Slayer (Tempest Remastered #97)
Dauthi Voidwalker (Modern Horizons 2 #81)
Dauthi Warlord (Tempest Remastered #98)
Faceless Devourer (Time Spiral Remastered #115)
Nether Traitor (Time Spiral Remastered #127)
Stronghold Overseer (Time Spiral #133)
Stronghold Rats (Time Spiral Remastered #142)
Vashta Nerada (Doctor Who #73)

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