Madison Li 1 Liberty Prime, Recharged 1 Automated Assembly Line 1 Brotherhood Scribe 1 Overencumbered 1 The Prydwen, Steel Flagship 1 Sentry Bot 1 Dweller's Journey 1 Curie, Emergent Intelligence 1 James, Wandering Dad 1 Nick Valentine, Private Eye 1 Synth Infiltrator 1 Assaultron Dominator 1 The Motherlode, Excavator 1 Plasma Caster 1 Synth Eradicator 1 Arcade Gannon 1 Electrosiphon 1 Red Death, Shipwrecker 1 Rex, Cyber-Hound 1 Sentinel Sarah Lyons 1 Shaun, Father of Synths 1 Sadistic Simulation 1 Brotherhood Vertibird 1 T-45 Power Armor 1 Ferrous Lake 1 HELIOS One 1 Austere Command 1 Open the Vaults 1 Mechanized Production 1 One with the Machine 1 Wake the Past 1 Mystic Forge 1 Panharmonicon 1 Solemn Simulacrum 1 Steel Overseer 1 Clifftop Retreat 1 Exotic Orchard 1 Glacial Fortress 1 Irrigated Farmland 1 Prairie Stream 1 Skycloud Expanse 1 Spire of Industry 1 Sulfur Falls 1 Temple of Enlightenment 1 Temple of Epiphany 1 Treasure Vault 1 Paladin Danse, Steel Maverick 1 Nerd Rage 1 Robobrain War Mind 1 Bottle-Cap Blast 1 Elder Owyn Lyons 1 Behemoth of Vault 0 1 C.A.M.P
The second ability of Cid, Timeless Artificer also lets you ignore the "singleton" rule in formats like Commander
You can include as many planeswalkers as you want, as long as your deck follows format rules and doesnt exceed four copies of the same card outside Commander
Lord Xander, the Collector: Xander is probably one of the first Grixis commanders to appeal to me
While transforming cards are creatures on both sides, MDFCs can be all kinds
