Adeliz, the Cinder Wind Arvad the Cursed Aryel, Knight of Windgrace Baird, Steward of Argive Danitha Capashen, Paragon Darigaaz Reincarnated Demonlord Belzenlok Evra, Halcyon Witness Firesong and Sunspeaker Garna, the Bloodflame Grand Warlord Radha Grunn, the Lonely King Hallar, the Firefletcher Jhoira, Weatherlight Captain Jodah, Archmage Eternal Josu Vess, Lich Knight Kazarov, Sengir Pureblood Kwende, Pride of Femeref Lyra Dawnbringer Marwyn, the Nurturer Muldrotha, the Gravetide Multani, Yavimaya's Avatar Naban, Dean of Iteration Naru Meha, Master Wizard Niambi, Faithful Healer Raff Capashen, Ship's Mage Rona, Disciple of Gix Shalai, Voice of Plenty Shanna, Sisay's Legacy Slimefoot, the Stowaway Slinn Voda, the Rising Deep Squee, the Immortal Tatyova, Benthic Druid Teshar, Ancestor's Apostle Tetsuko Umezawa, Fugitive Tiana, Ship's Caretaker Torgaar, Famine Incarnate Traxos, Scourge of Kroog Urgoros, the Empty One Valduk, Keeper of the Flame Verix Bladewing Whisper, Blood Liturgist Yargle, Glutton of Urborg Zahid, Djinn of the Lamp

5,000 Flip a coin
Supercharge X TRAP When your opponent declares an attack while the only monsters you control are Machine-Type "roid" monster(s): Draw 2 cards
It doesn't prevent effect damage though, so Gustav can be used to get you across the finish line in the late game
Court of Grace Court of Grace provides one of the best card advantage engines in Magic: the monarchy
One of the best ways to check for card legality in Historic is through Scryfall.com