Allowing Lutri would mean that every player who ever runs a deck with blue and red in it would want to have a copy of Lutri with them to use as a companion
Aminatou, the Fateshifter Commodore Guff Daretti, Scrap Savant Dihada, Binder of Wills Elminster Estrid, the Masked Freyalise, Llanowar's Fury Jared Carthalion Jeska, Thrice Reborn Lord Windgrace Minsc & Boo, Timeless Heroes Nahiri, the Lithomancer Ob Nixilis of the Black Oath Quintorius, History Chaser Rowan Kenrith Saheeli, the Gifted Sivitri, Dragon Master Tasha, the Witch Queen Teferi, Temporal Archmage Tevesh Szat, Doom of Fools Will Kenrith
The first of those is Helm of the Host, which is a four mana Equipment that costs five to equip
2 Be'lakor, The Dark Master Magic: The Gathering's expansion into the Warhammer universe brought with it a slew of powerful new Demons, and with it, this powerful new commander
Double Master borderless foil: $90 to $100 Kaladesh Inventions foil: $200 to $210 Darksteel foil: $120 to $130 Sword of Light and Shadow First printed in Darksteel with its original version priced at around $20, Sword of Light And Shadow protects against the MTG colors White and Black
1 Mauhr, Uruk-hai Captain
