Shadow, Mysterious Assassin Most sacrifice decks want to sacrifice small, recursive creatures or easily created tokens, going for quantity
Its like an extremely powerful Planeswalker ability, except it happens every turn from now on, and cant be attacked or destroyed by most conventional means
You might not find yourself assembling Tron often in Commander, but the format has so much ramp that you can play this colorless planeswalker with little trouble

Aerith Rescue Mission Alchemax Slayer-Bots Argent Dais Braided Net Bronze Tablet By Gnome Means Calciderm Clockspinning Collector's Case Constrictor Sage Corrosion Crashing Wave Crimestopper Sprite Cryogen Relic Curse of the Cabal Deadly Grub Deadwood Treefolk Deluge Virtuoso Dichotomancy Donatello, Rad Scientist Dramatist's Puppet Etched Slith Fear of Immobility Ferropede Fractal Mascot Freeze in Place Frostfist Strider Gilded Scuttler Grappling Kraken Hex Parasite Homesickness Ice Flan Impede Momentum Invasion of Kamigawa Involuntary Cooldown Ion Storm Jhoira's Timebug Keldon Marauders Loch Mare Lost in the Maze Lux Cannon Magmatic Hellkite Meat Locker // Drowned Diner Mechanozoa Medicine Runner Mind Spiral Mutated Cultist Myojin of Cryptic Dreams Nexus Mentality Norn's Dominion North Pole Research Base Oblivion Stone Omega, Heartless Evolution Out Cold Overlord of the Boilerbilges Petrifying Meddler Power Conduit Procrastinate Protocol Knight Proud Pack-Rhino Quarry Hauler Rapier Wit Reality Strobe Referee Squad Riftwing Cloudskate Rime Chill Riverwheel Sweep Rowdy Snowballers Sanctuary Wall Shackle Slinger Sharae of Numbing Depths

Pyrrhic Blast deals damage equal to the sacrificed creature's power to any target
Novel combos