37 cards where the full Oracle text includes “partner”

Akiri, Line-Slinger (C16)
Blaring Captain (BBD)
Blaring Recruiter (BBD)
Bruse Tarl, Boorish Herder (C16)
Chakram Retriever (BBD)
Chakram Slinger (BBD)
Gorm the Great (BBD)
Ikra Shidiqi, the Usurper (CM2)
Impetuous Protege (BBD)
Ishai, Ojutai Dragonspeaker (CM2)
Khorvath Brightflame (BBD)
Kraum, Ludevic's Opus (C16)
Krav, the Unredeemed (BBD)
Kydele, Chosen of Kruphix (C16)
Ley Weaver (BBD)
Lore Weaver (BBD)
Ludevic, Necro-Alchemist (C16)
Okaun, Eye of Chaos (BBD)
Pir, Imaginative Rascal (BBD)
Proud Mentor (BBD)
Ravos, Soultender (C16)
Regna, the Redeemer (BBD)
Reyhan, Last of the Abzan (CM2)
Rowan Kenrith (BBD)
Sidar Kondo of Jamuraa (C16)
Silas Renn, Seeker Adept (C16)
Soulblade Corrupter (BBD)
Soulblade Renewer (BBD)
Sylvia Brightspear (BBD)
Tana, the Bloodsower (C16)
Thrasios, Triton Hero (C16)
Toothy, Imaginary Friend (BBD)
Tymna the Weaver (C16)
Vial Smasher the Fierce (C16)
Virtus the Veiled (BBD)
Will Kenrith (BBD)
Zndrsplt, Eye of Wisdom (BBD)

It is the moment of discovery, the triumph of the mind, and the end of these results.