Yeah, it costs a lot but it's all colorless, and artifact ramp and Tron are things, so this seems just dumb
When Malfegor enters the battlefield, discard your hand
Interaction versus removal has never been better, and though March of Swirling Mists is likely to be better for most decks, Slip Out the Back definitely has a place, even outside of +1/+1 counters decks

Adrestia Aetherwing, Golden-Scale Flagship Arcee, Acrobatic Coupe Balamb Garden, Airborne Bessie, the Doctor's Roadster Blitzwing, Adaptive Assailant Cyclonus, Cybertronian Fighter Damocles Base, Sword of Kang Esika's Chariot Flamewar, Streetwise Operative Goldbug, Scrappy Scout Golden Argosy Grond, the Gatebreaker Heart of Kiran Jackdaw Jetfire, Air Guardian Megatron, Destructive Force Optimus Prime, Autobot Leader Parhelion II Prowl, Pursuit Vehicle RMS Titanic Ratchet, Rescue Racer Shorikai, Genesis Engine Skysovereign, Consul Flagship Slicer, High-Speed Antagonist Starscream, Seeker Leader The Belligerent The Falcon, Airship Restored The Fantasticar The Fire Nation Drill The Indomitable The Last Ride The Lunar Whale The Omenkeel The Prima Vista The Prydwen, Steel Flagship The Regalia The Thanos-Copter Ultra Magnus, Armored Carrier Valor's Flagship Weatherlight Weatherlight Compleated

Having access to such a strong stax piece in the Command Zone that gives access to one of the strongest color combinations in the game is just too much
#06 Caesar, Legions Emperor On my mid-year ranking, Caesar was at number eight, but he has jumped up to number six