44 cards where the set is “mul” and it’s legal in Pioneer

Aegar, the Freezing Flame (Multiverse Legends #31)
Anafenza, Kin-Tree Spirit (Multiverse Legends #1)
Atris, Oracle of Half-Truths (Multiverse Legends #34)
Aurelia, the Warleader (Multiverse Legends #35)
Ayara, First of Locthwain (Multiverse Legends #13)
Baral, Chief of Compliance (Multiverse Legends #8)
Captain Lannery Storm (Multiverse Legends #20)
Daxos, Blessed by the Sun (Multiverse Legends #2)
Dina, Soul Steeper (Multiverse Legends #37)
Emry, Lurker of the Loch (Multiverse Legends #9)
Firesong and Sunspeaker (Multiverse Legends #39)
Firja, Judge of Valor (Multiverse Legends #40)
Fynn, the Fangbearer (Multiverse Legends #26)
Goreclaw, Terror of Qal Sisma (Multiverse Legends #27)
Gyruda, Doom of Depths (Multiverse Legends #42)
Inga Rune-Eyes (Multiverse Legends #10)
Jegantha, the Wellspring (Multiverse Legends #44)
Judith, the Scourge Diva (Multiverse Legends #45)
Kaheera, the Orphanguard (Multiverse Legends #47)
Kenrith, the Returned King (Multiverse Legends #4)
Keruga, the Macrosage (Multiverse Legends #48)
Kroxa, Titan of Death's Hunger (Multiverse Legends #49)
Kwende, Pride of Femeref (Multiverse Legends #5)
Lutri, the Spellchaser (Multiverse Legends #52)
Niv-Mizzet Reborn (Multiverse Legends #53)
Obosh, the Preypiercer (Multiverse Legends #54)
Radha, Coalition Warlord (Multiverse Legends #55)
Raff, Weatherlight Stalwart (Multiverse Legends #56)
Renata, Called to the Hunt (Multiverse Legends #28)
Rona, Sheoldred's Faithful (Multiverse Legends #58)
Shanna, Sisay's Legacy (Multiverse Legends #59)
Squee, the Immortal (Multiverse Legends #22)
Sram, Senior Edificer (Multiverse Legends #6)
Tetsuko Umezawa, Fugitive (Multiverse Legends #12)
Teysa Karlov (Multiverse Legends #61)
Thalia, Guardian of Thraben (Multiverse Legends #7)
Tymaret, Chosen from Death (Multiverse Legends #18)
Umori, the Collector (Multiverse Legends #62)
Valduk, Keeper of the Flame (Multiverse Legends #24)
Yargle, Glutton of Urborg (Multiverse Legends #19)
Yarok, the Desecrated (Multiverse Legends #63)
Yorion, Sky Nomad (Multiverse Legends #64)
Zada, Hedron Grinder (Multiverse Legends #25)
Zirda, the Dawnwaker (Multiverse Legends #65)

In the blink of an eye, they strode from deep snow to the end of this search.