40 cards where the text includes “companion” and (the card types include “creature” and the card types include “legendary”)

Rose Noble (Secret Lair Drop #1580)
Susan Foreman (Doctor Who #110)
Leela, Sevateem Warrior (Doctor Who #107)
Jamie McCrimmon (Doctor Who #105)
Graham O'Brien (Doctor Who #104)
Ace, Fearless Rebel (Doctor Who #98)
Ryan Sinclair (Doctor Who #94)
Donna Noble (Doctor Who #82)
Dan Lewis (Doctor Who #78)
Bill Potts (Doctor Who #76)
Amy Pond (Doctor Who #75)
Vislor Turlough (Doctor Who #74)
Nyssa of Traken (Doctor Who #51)
Nardole, Resourceful Cyborg (Doctor Who #50)
Martha Jones (Doctor Who #48)
K-9, Mark I (Doctor Who #47)
Adric, Mathematical Genius (Doctor Who #33)
Tegan Jovanka (Doctor Who #28)
Romana II (Doctor Who #27)
Peri Brown (Doctor Who #26)
Jo Grant (Doctor Who #23)
Ian Chesterton (Doctor Who #22)
Barbara Wright (Doctor Who #14)
Clara Oswald (Doctor Who #9)
Yasmin Khan (Doctor Who #7)
Sarah Jane Smith (Doctor Who #6)
Rose Tyler (Doctor Who #5)
Hex, Kellan's Companion (Alchemy: Wilds of Eldraine #14)
Mowu, Loyal Companion (Commander Masters #306)
Treizeci, Sun of Serra (2022 Heroes of the Realm #1)
Zirda, the Dawnwaker (Ikoria: Lair of Behemoths #233)
Yorion, Sky Nomad (Ikoria: Lair of Behemoths #232)
Umori, the Collector (Ikoria: Lair of Behemoths #231)
Obosh, the Preypiercer (Ikoria: Lair of Behemoths #228)
Lutri, the Spellchaser (Ikoria: Lair of Behemoths #227)
Lurrus of the Dream-Den (Ikoria: Lair of Behemoths #226)
Keruga, the Macrosage (Ikoria: Lair of Behemoths #225)
Kaheera, the Orphanguard (Ikoria: Lair of Behemoths #224)
Jegantha, the Wellspring (Ikoria: Lair of Behemoths #222)
Gyruda, Doom of Depths (Ikoria: Lair of Behemoths #221)

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