48 cards where the color identity ≤ BUW and the text includes “whenever you draw”

Alandra, Sky Dreamer (Murders at Karlov Manor Commander #94)
A-Queza, Augur of Agonies (Streets of New Capenna #A-212)
A-Wizard Class (Adventures in the Forgotten Realms #A-81)
Chasm Skulker (March of the Machine Commander #218)
Detective of the Month (Murders at Karlov Manor Commander #21)
Diviner's Wand (Morningtide #142)
Dream Trawler (Theros Beyond Death #214)
Ethereal Investigator (Murders at Karlov Manor Commander #105)
Faerie Vandal (Streets of New Capenna #44)
Gixian Puppeteer (The Brothers' War #99)
Gurgling Anointer (The Brothers' War #104)
Hoofprints of the Stag (New Capenna Commander #203)
Jace, Arcane Strategist (War of the Spark #270)
Jace's Erasure (Magic 2012 #60)
Jace's Projection (War of the Spark #272)
Jaded Analyst (Murders at Karlov Manor #62)
Knights of Dol Amroth (The Lord of the Rings: Tales of Middle-earth #59)
Lat-Nam Adept (The Brothers' War #56)
Mantle of Tides (Throne of Eldraine #52)
Minn, Wily Illusionist (Forgotten Realms Commander #16)
Moonring Mirror (Champions of Kamigawa #262)
Mystic Skyfish (Core Set 2021 #326)
Nadir Kraken (Murders at Karlov Manor Commander #112)
Ominous Seas (Ikoria: Lair of Behemoths #61)
Oneirophage (Jumpstart #162)
Prince Imrahil the Fair (The Lord of the Rings: Tales of Middle-earth #219)
Private Eye (Murders at Karlov Manor #223)
Psychic Corrosion (Core Set 2019 #68)
Psychosis Crawler (Murders at Karlov Manor Commander #234)
Queza, Augur of Agonies (Streets of New Capenna #212)
Shabraz, the Skyshark (Commander 2020 #14)
Sheoldred, the Apocalypse (Dominaria United #107)
Sphinx's Tutelage (Magic Origins #76)
Stalwarts of Osgiliath (The Lord of the Rings: Tales of Middle-earth #33)
Starscream, Power Hungry // Starscream, Seeker Leader (Transformers #5)
Starscream, Power Hungry // Starscream, Seeker Leader (Transformers #5)
Starving Revenant (The Lost Caverns of Ixalan #123)
Steelgaze Griffin (Throne of Eldraine #65)
Teferi, Hero of Dominaria (Dominaria #207)
Teferi's Talent (March of the Machine Commander #74)
Teferi's Tutelage (Core Set 2021 #78)
Teferi, Temporal Pilgrim (The Brothers' War #66)
The Watcher in the Water (The Lord of the Rings: Tales of Middle-earth #75)
Thopter Mechanic (The Brothers' War #68)
Tolarian Kraken (Core Set 2021 #80)
Toothy, Imaginary Friend (Battlebond #12)
Vodalian Wave-Knight (March of the Machine Commander #43)
Wiretapping (Streets of New Capenna #65)
Wizard Class (Adventures in the Forgotten Realms #81)

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