17 cards where the card is tagged “cross-brand-card”

Applejack (Secret Lair Drop #1537)
Bag of Holding (Commander Legends: Battle for Baldur's Gate #299)
Discord, Lord of Disharmony (Secret Lair Drop #798)
Dungeon Master (2016 Heroes of the Realm #2)
Fluttershy (Secret Lair Drop #1538)
Grimlock, Dinobot Leader // Grimlock, Ferocious King (HasCon 2017 #1)
Grimlock, Dinobot Leader // Grimlock, Ferocious King (HasCon 2017 #1)
Kharis & The Beholder (2018 Heroes of the Realm #1)
Nerf War (HasCon 2017 #2)
Nightmare Moon // Princess Luna (Ponies: The Galloping #1)
Nightmare Moon // Princess Luna (Ponies: The Galloping #1)
Nira, Hellkite Duelist (2016 Heroes of the Realm #3)
Optimus Prime, Inspiring Leader (2018 Heroes of the Realm #2)
Pinkie Pie (Secret Lair Drop #1539)
Princess Twilight Sparkle (Ponies: The Galloping #2)
Rainbow Dash (Secret Lair Drop #1540)
Rarity (Ponies: The Galloping #3)
Sword of Dungeons & Dragons (Unsanctioned #84)
Underdark Beholder (Mystery Booster Playtest Cards 2021 #49)

This search is finished. Now the real work can begin.