TLDR If youre wondering how to make custom Magic cards, start by searching an existing card and letting the builder auto-fill the boring parts
The 1-Star rare limit also means that while you'll be able to trade rare full-art cards, like Bulbasaur (A1 227/226) or Marshadow (A1a 074/068), you'll be blocked from trading harder-to-find cards like the 3-Star Pikachu ex (A1 281/226) or the Golden Crown-rare Charizard ex (A1 284/226)
Now, let's turn those digital files into real, playable cards
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 Shorikai, Genesis Engine Sivitri, Dragon Master Tasha, the Witch Queen Teferi, Temporal Archmage Tevesh Szat, Doom of Fools The Grand Calcutron Will Kenrith