10 cards where the text includes “companion” and (the card is available on Paper) and the set is “iko”

Gyruda, Doom of Depths (Ikoria: Lair of Behemoths #221)
Jegantha, the Wellspring (Ikoria: Lair of Behemoths #222)
Kaheera, the Orphanguard (Ikoria: Lair of Behemoths #224)
Keruga, the Macrosage (Ikoria: Lair of Behemoths #225)
Lurrus of the Dream-Den (Ikoria: Lair of Behemoths #226)
Lutri, the Spellchaser (Ikoria: Lair of Behemoths #227)
Obosh, the Preypiercer (Ikoria: Lair of Behemoths #228)
Umori, the Collector (Ikoria: Lair of Behemoths #231)
Yorion, Sky Nomad (Ikoria: Lair of Behemoths #232)
Zirda, the Dawnwaker (Ikoria: Lair of Behemoths #233)

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